tag:blogger.com,1999:blog-78262302082893421292024-03-07T20:42:24.081-08:00ปริมาณสัมพันธ์ ข้อสอบSunnyhttp://www.blogger.com/profile/13675268776507579585noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7826230208289342129.post-89930442631774233692012-07-02T23:03:00.003-07:002012-07-02T23:03:57.317-07:00<br />
<div align="center" class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: center;">
<b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 24.0pt; mso-hansi-font-family: JasmineUPCBold;">ปริมาณสัมพันธ์<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<br /></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: CordiaNew-Bold; font-size: 18.0pt; mso-hansi-font-family: CordiaNew-Bold;">ตะลุยโจทย์
เคมี บทที่</span></b><b><span style="font-family: CordiaNew-Bold; font-size: 18.0pt; mso-hansi-font-family: CordiaNew-Bold;"> 4 <span lang="TH">ปริมาณสัมพันธ์</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<br /></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<br /></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">1. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A 2 <span lang="TH">อะตอม มีมวลเท่ากับ</span>
1.824 x </span><!--[if gte msEquation 12]><m:oMath><m:sSup><m:sSupPr><span
style='mso-bidi-font-size:11.0pt;font-family:"Cambria Math","serif";
mso-ascii-font-family:"Cambria Math";mso-hansi-font-family:"Cambria Math";
mso-bidi-font-family:AngsanaNew;font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>10</m:r></span></i></m:e><m:sup><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>-</m:r><m:r>22</m:r></span></i></m:sup></m:sSup></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-font-size: 14.0pt; mso-bidi-language: TH; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-text-raise: -4.5pt; position: relative; top: 4.5pt;"><!--[if gte vml 1]><v:shapetype id="_x0000_t75"
coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe"
filled="f" stroked="f">
<v:stroke joinstyle="miter"/>
<v:formulas>
<v:f eqn="if lineDrawn pixelLineWidth 0"/>
<v:f eqn="sum @0 1 0"/>
<v:f eqn="sum 0 0 @1"/>
<v:f eqn="prod @2 1 2"/>
<v:f eqn="prod @3 21600 pixelWidth"/>
<v:f eqn="prod @3 21600 pixelHeight"/>
<v:f eqn="sum @0 0 1"/>
<v:f eqn="prod @6 1 2"/>
<v:f eqn="prod @7 21600 pixelWidth"/>
<v:f eqn="sum @8 21600 0"/>
<v:f eqn="prod @7 21600 pixelHeight"/>
<v:f eqn="sum @10 21600 0"/>
</v:formulas>
<v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/>
<o:lock v:ext="edit" aspectratio="t"/>
</v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:27.75pt;
height:15pt'>
<v:imagedata src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png"
o:title="" chromakey="white"/>
</v:shape><![endif]--><!--[if !vml]--><img height="20" src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image002.gif" v:shapes="_x0000_i1025" width="37" /><!--[endif]--></span><!--[endif]--><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> <span lang="TH">กรัม มวลอะตอมของ</span> A <span lang="TH">มีค่าเท่าใด</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">( <span lang="TH">กำหนดให้</span> 12 1 <span lang="TH">มวลของ</span> C – 12 <span lang="TH">เท่ากับ</span>
1.66x10–24 <span lang="TH">กรัม</span> ) </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 55 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">1. <span lang="TH">ตอบ</span> 55<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A 2 <span lang="TH">อะตอม</span> = 1.824 x 10–22
<span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A 1 <span lang="TH">อะตอม</span> = </span><span style="font-family: "Times New Roman","serif"; font-size: 10.0pt;">1824 10 22<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 10.0pt;">2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 10.0pt;">. </span><span style="font-family: SymbolMT; font-size: 10.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× − </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 9.12 x 10–23 <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
มวลอะตอม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A = </span><span style="font-family: "Times New Roman","serif"; font-size: 10.0pt;">1.66
10 24<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 10.0pt;">9.12 10 23-25<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 10.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× −<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 10.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× − </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 55<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">2(<span lang="TH">มช</span>
40) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> M <span lang="TH">มีมวลอะตอม</span>
70 <span lang="TH">และมีความหนาแน่นเท่ากับ</span> 5.02 g / cm3 <span lang="TH">ปริมาตรเฉลี่ย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ของธาตุนี้</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
1 <span lang="TH">อะตอม จะมีค่ากี่</span> cm3 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 2.31 x </span><!--[if gte msEquation 12]><m:oMath><m:sSup><m:sSupPr><span
style='mso-bidi-font-size:11.0pt;font-family:"Cambria Math","serif";
mso-ascii-font-family:"Cambria Math";mso-hansi-font-family:"Cambria Math";
mso-bidi-font-family:AngsanaNew;font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>10</m:r></span></i></m:e><m:sup><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>-</m:r><m:r>22</m:r></span></i></m:sup></m:sSup></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-font-size: 14.0pt; mso-bidi-language: TH; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-text-raise: -4.5pt; position: relative; top: 4.5pt;"><!--[if gte vml 1]><v:shape id="_x0000_i1025"
type="#_x0000_t75" style='width:27.75pt;height:15pt'>
<v:imagedata src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png"
o:title="" chromakey="white"/>
</v:shape><![endif]--><!--[if !vml]--><img height="20" src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image002.gif" v:shapes="_x0000_i1025" width="37" /><!--[endif]--></span><!--[endif]--><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 2. 1.18 x </span><!--[if gte msEquation 12]><m:oMath><m:sSup><m:sSupPr><span
style='mso-bidi-font-size:11.0pt;font-family:"Cambria Math","serif";
mso-ascii-font-family:"Cambria Math";mso-hansi-font-family:"Cambria Math";
mso-bidi-font-family:AngsanaNew;font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>10</m:r></span></i></m:e><m:sup><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>-</m:r><m:r>25</m:r></span></i></m:sup></m:sSup></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-font-size: 14.0pt; mso-bidi-language: TH; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-text-raise: -4.5pt; position: relative; top: 4.5pt;"><!--[if gte vml 1]><v:shape id="_x0000_i1025"
type="#_x0000_t75" style='width:27.75pt;height:15pt'>
<v:imagedata src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image003.png"
o:title="" chromakey="white"/>
</v:shape><![endif]--><!--[if !vml]--><img height="20" src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image004.gif" v:shapes="_x0000_i1025" width="37" /><!--[endif]--></span><!--[endif]--><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 3. 4.3 x </span><!--[if gte msEquation 12]><m:oMath><m:sSup><m:sSupPr><span
style='mso-bidi-font-size:11.0pt;font-family:"Cambria Math","serif";
mso-ascii-font-family:"Cambria Math";mso-hansi-font-family:"Cambria Math";
mso-bidi-font-family:AngsanaNew;font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>10</m:r></span></i></m:e><m:sup><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>-</m:r><m:r>25</m:r></span></i></m:sup></m:sSup></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-font-size: 14.0pt; mso-bidi-language: TH; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-text-raise: -4.5pt; position: relative; top: 4.5pt;"><!--[if gte vml 1]><v:shape id="_x0000_i1025"
type="#_x0000_t75" style='width:27.75pt;height:15pt'>
<v:imagedata src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image003.png"
o:title="" chromakey="white"/>
</v:shape><![endif]--><!--[if !vml]--><img height="20" src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image004.gif" v:shapes="_x0000_i1025" width="37" /><!--[endif]--></span><!--[endif]--><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 4. 5.18 x </span><!--[if gte msEquation 12]><m:oMath><m:sSup><m:sSupPr><span
style='mso-bidi-font-size:11.0pt;font-family:"Cambria Math","serif";
mso-ascii-font-family:"Cambria Math";mso-hansi-font-family:"Cambria Math";
mso-bidi-font-family:AngsanaNew;font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>10</m:r></span></i></m:e><m:sup><i
style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:11.0pt;
font-family:"Cambria Math","serif";mso-bidi-font-family:AngsanaNew'><m:r>-</m:r><m:r>25</m:r></span></i></m:sup></m:sSup></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-font-size: 14.0pt; mso-bidi-language: TH; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-text-raise: -4.5pt; position: relative; top: 4.5pt;"><!--[if gte vml 1]><v:shape id="_x0000_i1025"
type="#_x0000_t75" style='width:27.75pt;height:15pt'>
<v:imagedata src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image003.png"
o:title="" chromakey="white"/>
</v:shape><![endif]--><!--[if !vml]--><img height="20" src="file:///C:\Users\User\AppData\Local\Temp\msohtmlclip1\01\clip_image004.gif" v:shapes="_x0000_i1025" width="37" /><!--[endif]--></span><!--[endif]--><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">2(<span lang="TH">มช</span>
40) <span lang="TH">ตอบข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากมวลอะตอม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> M = 70 amu = (70)(1.66x10–24) <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ความหนาแน่น</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= 5.02 g/cm3 <span lang="TH">ปริมาตร</span> = ?<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
ความหนาแน่น</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = <span lang="TH">ปริมาตร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= 5.02<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(70)(1.66</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">×</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">10</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">− </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">24) </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">= 2.31x10-23
g/cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">3. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สมมติธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> X <span lang="TH">มี</span> 3 <span lang="TH">ไอโซโทป
ในธรรมชาติ คือ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">เปอร์เซ็นต์ในธรรมชาติ
มวล</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ไอโซโทปที่</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
1<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ไอโซโทปที่</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ไอโซโทปที่</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">80<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">15<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">5<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">12<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">13<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">14<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จงหามวลอะตอมเฉลี่ยของธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(12.25
)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">Σ </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">( % </span><span style="font-family: AngsanaNew; font-size: 10.0pt; mso-hansi-font-family: AngsanaNew;">x </span><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> )<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "BrowalliaNew-Bold","sans-serif"; font-size: 12.0pt; mso-bidi-font-family: BrowalliaNew-Bold;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">3. <span lang="TH">ตอบ</span> 12.25<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลอะตอมเฉลี่ย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> x = 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">Σ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(% x <span lang="TH">มวล</span>)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(80 x 12) </span><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">+</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(15 x 13) </span><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">+</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(5 x 14)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 960 </span><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">+</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1 10905 </span><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">+ </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">70<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1110205 =
12.25<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">4. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลอะตอมเฉลี่ยของธาตุออกซิเจนในธรรมชาติเท่ากับ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
16.032 <span lang="TH">แสดงว่าไอโซโทปใดของ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ออกซิเจนที่มีมากที่สุดในธรรมชาติ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 16O 2. 17O
3. 18O 4. <span lang="TH">เท่ากัน </span></span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( <span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">4. <span lang="TH">ตอบ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">เหตุผล </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เพราะมวลอะตอมเฉลี่ยของธาตุจะมีค่าใกล้เคียงกับมวลที่มีเปอร์เซ็นต์ในธรรมชาติ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">5. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> D <span lang="TH">ประกอบด้วยไอโซโทป</span> 2 <span lang="TH">ชนิด ที่มีมวลอะตอม</span> 10.00 <span lang="TH">และ</span> 11.00 <span lang="TH">ตามลำดับ หาก</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลอะตอมของธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
D <span lang="TH">เท่ากับ</span> 10.20 <span lang="TH">ปริมาณในธรรมชาติของ</span> D
<span lang="TH">ที่มีมวลอะตอม</span> 11.00<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะเท่ากับเท่าใด
</span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(
20 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">5. <span lang="TH">ตอบ</span> 20<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นำข้อมูลที่ได้มาเขียนตาราง ให้สมมติ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> % <span lang="TH">ในธรรมชาติ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">D % <span lang="TH">ในธรรมชาติ มวล</span> M – M <span lang="TH">น้อยสุด</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">ไอโซโทป</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">
1<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">ไอโซโทป</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">
2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">100 – A<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">A<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">10<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">11<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">10 – 10 = 0<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">11 – 10 = 1<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M</span><span lang="TH" style="font-family: AngsanaNew; font-size: 14.5pt; mso-hansi-font-family: AngsanaNew;">เฉลี่ย </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">Σ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">% ( <span lang="TH">มวล</span> - <span lang="TH">มวลน้อยที่สุด</span>)
+ <span lang="TH">มวลน้อยที่สุด</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= </span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<i><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">A </span></i><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">+
10<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">A = (10.20 –
10) x 100 = 20<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">6(<span lang="TH">มช</span>
46) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุลของสารในข้อใดมีค่ามากที่สุด</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. Ca3(PO4)2 2.
CuSO4 . 5H2O 3. Pb(NO3)2 4. K2Cr2O7 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "BrowalliaNew-Bold","sans-serif"; font-size: 12.0pt; mso-bidi-font-family: BrowalliaNew-Bold;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">3<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">6(<span lang="TH">มช</span>
46) <span lang="TH">ตอบ ข้อ</span> 3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 1 <span lang="TH">มวลโมเลกุล</span> Ca3(PO4) 2
= 3(40) + [31 + 4(16)] x 2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 120 + (95)2 =
310<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2 <span lang="TH">มวลโมเลกุล</span> CuSO4 . 5H2O = 63.5 + 32 +4(16) + 5[2(1) +
16]<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 63.5 + 32 +
64 + 90 = 249.5<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3 <span lang="TH">มวลโมเลกุล</span> Pb(NO3)2 = 207 + [14 + 3(16)]2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 207 + 124 =
331<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
4 <span lang="TH">มวลโมเลกุล</span> K2Cr2O7 = 2(39) + 2(52) + 7(16)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 78 + 104 +
112 = 294<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">∴ </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Pb (NO3)2 <span lang="TH">จะมีมวลโมเลกุลมากที่สุด</span>
= 331<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 2 <span lang="TH">โมล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">H 6.02x1023 <span lang="TH">อะตอม</span> = 1 <span lang="TH">โมล</span>–<span lang="TH">อะตอม มวล</span>
H2O 1 <span lang="TH">โมล</span>–<span lang="TH">โมเลกุล</span> = 18 <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">NO 6.02x1023 <span lang="TH">โมเลกุล</span> = 1 <span lang="TH">โมล</span>–<span lang="TH">โมเลกุล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">Na+ 6.02x1023 <span lang="TH">อิออน</span> = 1 <span lang="TH">โมล</span>–<span lang="TH">อิออน</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สูตรคำนวณ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
n = M<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g = 6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 10.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 22V.4 = <span lang="TH">อ</span>.<span lang="TH">อ</span>.<span lang="TH">ย</span> 6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 10.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× ×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
n = <span lang="TH">จำนวนโมล</span> , g = <span lang="TH">มวลสารที่มีอยู่</span> (<span lang="TH">กรัม</span>)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M = <span lang="TH">มวลโมเลกุล หรือ มวลอะตอม </span>, N = <span lang="TH">จำนวนโมเลกุล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V = <span lang="TH">ปริมาตรแก๊ส</span> (dm3, Lit)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>. = <span lang="TH">จำนวนอนุภาคย่อย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>. = <span lang="TH">อัตราอนุภาคย่อยในโจทย์นั้น
ๆ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1 <span lang="TH">โมล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวนอนุภาค</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02x1023 <span lang="TH">อนุภาค</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มีมวลเท่ากับโมเลกุลหรือ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลอะตอม
แต่มีหน่วยเป็นกรัม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แก๊สหรือไอที่มีปริมาตร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Lit(dm3) <span lang="TH">ที่</span> STP (1 atm, 0oC)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">**1000 cm3 = 1
Lit**<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "BrowalliaNew-Bold","sans-serif"; font-size: 12.0pt; mso-bidi-font-family: BrowalliaNew-Bold;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">7(<span lang="TH">มช</span>
39) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้อความใดที่ </span><b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ไม่ใช่ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เป็นสมบัติของก๊าซใดๆ ปริมาตร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 22.4 dm3 <span lang="TH">ที่อุณหภูมิความดัน</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มาตรฐาน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. <span lang="TH">จำนวนโมล</span> = 6.02x1023 <span lang="TH">โมล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2. <span lang="TH">มวล</span> = <span lang="TH">มวลโมเลกุลคิดเป็นกรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3. <span lang="TH">จำนวนโมเลกุล</span> = 6.02x1023 <span lang="TH">โมเลกุล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">4. <span lang="TH">จำนวนโมเลกุลของก๊าซนี้เท่ากับจำนวนโมเลกุลของไฮโดรเจน </span></span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span>
1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">7(<span lang="TH">มช</span>
39) <span lang="TH">ตอบ ข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">เหตุผล </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เพราะก๊าซ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 22.4 <span lang="TH">ลิตร ที่</span> STP <span lang="TH">มีเพียง</span> 1 <span lang="TH">โมลเท่านั้น ไม่ใช่</span> 6.02 x 1023 <span lang="TH">โมล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC-Bold","serif"; font-size: 16.0pt; mso-bidi-font-family: AngsanaUPC-Bold;">8. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แก๊สโพรเพน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
(C3H8) <span lang="TH">จำนวน</span> 22 <span lang="TH">กรัม ที่</span> STP <span lang="TH">จะมีปริมาตรกี่ลิตร </span></span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(11.2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">8. <span lang="TH">ตอบ</span> 11.2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> (M) = 3(12) + 8(1) = 36 + 8 = 44<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลสารที่มี</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
(g) = 22 <span lang="TH">กรัม ปริมาตรแก๊ส</span> (V<span lang="TH">แก๊ส</span>) = ?<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
</span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= V2<span lang="TH">แ</span>2<span lang="TH">ก</span>.4<span lang="TH">๊ส</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V<span lang="TH">แก๊ส</span>
= </span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x 22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 4242 x 22.4 =
11.2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC-Bold","serif"; font-size: 16.0pt; mso-bidi-font-family: AngsanaUPC-Bold;">9. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แก๊สชนิดหนึ่งปริมาตร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
67.2 <span lang="TH">ลิตร ที่</span> STP <span lang="TH">จะมีกี่โมเลกุล </span></span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(1.806x1024)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">9. <span lang="TH">ตอบ</span> 1.806 x 1024<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(V<span lang="TH">แก๊ส</span>) = 67.2 dm3 , N = ?<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">67.2 x 6.02 x
1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 1.806 x
1024 <span lang="TH">โมเลกุล</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">10. </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แก๊สชนิดหนึ่งหนัก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 0.2 <span lang="TH">กรัม มีปริมาตร </span>400
cm3 <span lang="TH">ที่</span> STP <span lang="TH">แก๊สชนิดนี้มีมวลโมเลกุลเท่าไร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 11.2 2. 16
3. 18 4. 20.5 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "BrowalliaNew-Bold","sans-serif"; font-size: 12.0pt; mso-bidi-font-family: BrowalliaNew-Bold;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">5<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">10. <span lang="TH">ตอบ ข้อ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โจทย์กำหนด</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> g = 0.2 <span lang="TH">กรัม</span> , V<span lang="TH">แก๊ส</span> = 1000<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">400 cm3 = 0.4
dm3 M = ?<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
</span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V <span lang="TH">จะได้</span> M = V<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g x 22.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M = 0.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0.2 x 22.4 =
11.2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">11(<span lang="TH">มช</span> 38) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ก๊าซชนิดหนึ่งมีปริมาณ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
448 cm3 <span lang="TH">ที่</span> STP <span lang="TH">มีมวล</span> 0.60 <span lang="TH">กรัม ก๊าซนี้น่าจะได้แก่</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. NH3 2. CH4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3. C2 H6 4. CO2
</span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">11(<span lang="TH">มช</span> 38) <span lang="TH">ตอบข้อ</span> 3.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โจทย์บอก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> V</span><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แก๊ส </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
448 Cm3 = 0.448 <span lang="TH">ลิตร</span> , g = 0.60 <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
m g = 22v.4<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0m.6 = 0.44282
.<span lang="TH">ล</span>4<span lang="TH">ิตร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">m = 448 10 3<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0.6(22.4 103)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× </span><span style="font-family: SymbolMT; font-size: 14.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">−<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: BrowalliaNew-Bold;">× </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 30<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แสดงว่าสารนี้มีมวลโมเลกุลเท่ากับ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
30 <span lang="TH">ซึ่งน่าจะเป็น</span> C2H6<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">เพราะ</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> C2H6 <span lang="TH">มีมวลโมเลกุล</span> = 2(12) + 6(1) = 30 <span lang="TH">เช่นกัน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: BrowalliaNew-Bold;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">12(<span lang="TH">มช</span> 43) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้านักเรียนตักน้ำบริสุทธ์ิมา</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2 cm3 <span lang="TH">น้ำนั้นจะมีจำนวนโมเลกุลเท่าใด</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กำหนดให้</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
: <span lang="TH">ความหนาแน่นของน้ำเท่ากับ</span> 1.0 g/cm3<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 0.11 2. 36
3. 6.69x1022 4. 1.20x1024 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">12(<span lang="TH">มช</span> 43) <span lang="TH">ตอบ ข้อ</span> 3.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุลของน้ำ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> ( H2O) = 18<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">และ
น้ำ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 2 cm3 <span lang="TH">จะมีมวล</span> = 2 <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N m g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">128 N<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">N = 6.69 x 1023 <span lang="TH">โมเลกุล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">6<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">13(<span lang="TH">มช</span> 41) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สาร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">มีมวลโมเลกุล</span> 64 <span lang="TH">ประกอบด้วย</span> S <span lang="TH">และ</span> O <span lang="TH">อย่างละเท่าๆ กัน โดยมวล ถ้า</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สาร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A 16 <span lang="TH">กรัม มีจำนวนอนุภาคเท่ากับสาร</span> B 19 <span lang="TH">กรัม สาร</span>
B <span lang="TH">ควรเป็นสารอะไร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. NO2 2. CS2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3. CO2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">4. SO2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span>
2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">13(<span lang="TH">มช</span> 41) <span lang="TH">ตอบ ข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 1 </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">คิดสาร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
m g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N </span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023 1664<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N </span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 0.25 x 6.02
x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นั่นคือ
จำนวนอนุภาคของ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A = 4 x 6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เนื่องจากจำนวนอนุภาคของ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
B <span lang="TH">เท่ากับ</span> A <span lang="TH">นั่นคือ จำนวนอนุภาค</span> B = 4
x 6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">คิดสาร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> B<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
m g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N </span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.02 1023 1m9<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0.25 x 6.02
x1023 </span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">mB = 76<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
สาร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> B <span lang="TH">ควรเป็น</span> CS2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">เพราะ</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> CS2 <span lang="TH">มีมวลโมเลกุล</span> = 12 + 2(32) = 76 <span lang="TH">เช่นเดียวกับ</span>
B<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">14(<span lang="TH">มช</span> 38) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">กรดแอซีติก</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
24 <span lang="TH">กรัม จะมีจำนวนออกซิเจนอะตอมอยู่ทั้งหมดเท่ากับ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 6.02 x 1023 <span lang="TH">อะตอม</span> 2. 4.82 x 1023 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3. 2.41 x 1023 <span lang="TH">อะตอม</span> 4. 1.20 x 1023 <span lang="TH">อะตอม </span></span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span>
2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">14(<span lang="TH">มช</span>38) <span lang="TH">ตอบข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กรดแอซีติก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> (CH3COOH ) <span lang="TH">มีมวลโมเลกุล</span>
= 12+3(1)+12+16+16+1 = 60<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
6.02 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">× </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= m g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = m g (6.02 x
1023)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 2604 (6.02
x 1023)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">N = 2.41 x 1023 <span lang="TH">โมเลกุล</span></span></b><span style="font-family: AngsanaNew; font-size: 2.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">7<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เนื่องจาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> CH3COOH 1 <span lang="TH">โมเลกุล ประกอบด้วย</span>
O 2 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
CH3COOH 2.41 x 1023 <span lang="TH">โมเลกุล ประกอบด้วย</span> O 4.82 x 1023 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">15(<span lang="TH">มช</span> 44) <span lang="TH">กำหนดให้ </span></span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">A
= Na</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">S</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">4</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">O</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">6
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">, B = Al</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(SO</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">4</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">3
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">, C = H</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">4</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">P</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">O</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">7<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้าสารประกอบเหล่านี้มีมวลเท่ากันเท่ากับ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2 <span lang="TH">กรัม จงเรียงลำดับจำนวนอะตอมของ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ออกซิเจน
ในโมเลกุลจากมากไปหาน้อย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. A C B 2. C B
A 3. B A C 4. A B C </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">15(<span lang="TH">มช</span> 44) <span lang="TH">ตอบ ข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>.
x 6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span> = M<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้
จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>. = M<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g x <span lang="TH">อ</span>.<span lang="TH">อ</span>.<span lang="TH">ย</span>. x 6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 1 </span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Na2S4O6
1 <span lang="TH">โมเลกุล จะมี</span> O 6 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 2270 x 6 x 6.02 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">23<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 2.68 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">22 </span><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อะตอม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Al2(SO4)3
1 <span lang="TH">โมเลกุล จะมี </span>O 12 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 3422 x 12 x 6.02 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">23<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 4.22 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">22 </span><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อะตอม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 3 </span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">H4P2O7
1 <span lang="TH">โมเลกุล จะมี</span> O 7 <span lang="TH">อะตอม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 1728 x 7 x 6.02 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">23<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวน</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 4.73 x 10</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">23 </span><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อะตอม</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">จะเห็นว่าจำนวนอะตอมออกซิเจนในสาร</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> C > B > A<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">16(<span lang="TH">มช</span> 39) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">มีมวลอะตอมเท่ากับ</span> 60.0 <span lang="TH">ทำปฏิกิริยากับธาตุ</span>
B <span lang="TH">ทำให้เกิดสารประกอบ</span> AB2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">ถ้า</span><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
2 <span lang="TH">กรัมของ</span> A <span lang="TH">ทำปฏิกิริยากับ</span> 8 <span lang="TH">กรัมของ</span> B <span lang="TH">ได้สารประกอบ</span> AB2 <span lang="TH">มวลอะตอมของ</span>
B <span lang="TH">คือ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 90 2. 120 3.
160 4. 190 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">16(<span lang="TH">มช</span> 39) <span lang="TH">ตอบ ข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสูตรโมเลกุลจะได้ว่า โมล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">B<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">A
= 21<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">8<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
โมล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> B = 2 <span lang="TH">โมล</span> A<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">mBgB<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= mAA g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(2)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">mB 8 = (2) 60 2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">m</span></b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">B
</span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">=
120<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">17(<span lang="TH">มช</span> 49) </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อเผาธาตุ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X <span lang="TH">จำนวน</span> 5.00 <span lang="TH">กรัม จะได้ผลิตภัณฑ์เป็นสารประกอบ</span>
X2O <span lang="TH">หนัก</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.74 <span lang="TH">กรัม ธาตุ</span> X <span lang="TH">มีมวลอะตอมเท่าใด</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1. 13.5 2. 23.0
3. 33.5 4. 39.1 </span><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">17(<span lang="TH">มช</span> 49) <span lang="TH">ตอบ ข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก มวล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> X2O = 6.74 <span lang="TH">กรัม มีมวล</span> X
= 5.00 <span lang="TH">กรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะมีมวล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = 6.74 - 5.00 = 1.74 <span lang="TH">กรัม</span> (O = 16)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X2O <span lang="TH">มีอัตราส่วน โมล</span>O<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">X
= 12<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
1<span lang="TH">โมล</span> X = 2 <span lang="TH">โมล</span> O ; </span><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎥⎦</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎤</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎢⎣</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎡</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"> =<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">n g<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">X = 2 </span><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">O<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Mx 5 = 2 </span><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">16<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">1.74<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">∴ </span><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> Mx = 23.0<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 3 <span lang="TH">ความเข้มข้นสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">1. <span lang="TH">ความเข้มข้นแบบร้อยละ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละโดยมวลต่อมวล</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= <span lang="TH">มวลสารละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลตัวถูกละลาย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละโดยปริมาตรต่อปริมาตร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= <span lang="TH">ปริมาตรสารละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ปริมาตรตัวถูกละลาย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละโดยมวลต่อปริมาตร</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= </span><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">ปริมาตรสารละลาย</span><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> (cm3)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">มวลตัวถูกละลาย</span><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> (<span lang="TH">กรัม</span>)
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x 100<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">9<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">2. <span lang="TH">โมลต่อลิตร</span> (mol / dm3 ) (<span lang="TH">โมลาร์ลิตี้</span>) (M)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สูตรที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 1 <span lang="TH">ใช้สำหรับการเตรียมสารละลายโดยใส่ตัวถูกละลายลงในตัวทำละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">n = M<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g = 6.02 x 1023<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = 22V.4 = 23 <span lang="TH">อ</span>.<span lang="TH">อ</span>.<span lang="TH">ย</span> x 6.02 x 10<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span> = 10c0v0<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
n = <span lang="TH">จำนวนโมลตัวถูกละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g = <span lang="TH">มวลตัวถูกละลายที่มีอยู่</span> (<span lang="TH">กรัม</span>)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M = <span lang="TH">มวลโมเลกุล หรือ มวลอะตอมตัวถูกละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">N = <span lang="TH">จำนวนโมเลกุลตัวถูกละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V = <span lang="TH">ปริมาตรแก๊สซึ่งเป็นตัวถูกละลาย</span> (dm3 , Lit)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>. = <span lang="TH">จำนวนอนุภาคย่อยของตัวถูกละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อ</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">.<span lang="TH">อ</span>.<span lang="TH">ย</span>. = <span lang="TH">อัตราส่วนอนุภาคย่อยตัวถูกละลายในโจทย์</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">c = <span lang="TH">ความเข้มข้นของสารละลาย</span> (mol / dm3)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">v = <span lang="TH">ปริมาตรของสารละลาย</span> (cm3)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สูตร</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 <span lang="TH">ใช้เมื่อทำการปรับเปลี่ยนความเข้มข้นและปริมาตรสารละลายเดิม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">c</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">v</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= c</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">v</span><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">
c1 . c2 = <span lang="TH">ความเข้มข้นของสารละลายตอนแรก และ ตอนหลัง ตามลำดับ</span>
(mol/lit)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">v1 . v2 = <span lang="TH">ปริมาตรของสารละลายตอนแรก และ ตอนหลัง ตามลำดับ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สูตร</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 3 <span lang="TH">ใช้เมื่อผสมสารละลายหลายตัวเข้าด้วยกัน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">c<span lang="TH">รวม</span>
v<span lang="TH">รวม</span> = c1 v1 + c2 v2 + …<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">
c1 . c2 , c<span lang="TH">รวม</span> = <span lang="TH">ความเข้มข้นของสารละลายที่</span>
1 , <span lang="TH">ที่</span> 2 <span lang="TH">และ สารละลายรวม ตามลำดับ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">v1 . v2 , v<span lang="TH">รวม</span> = <span lang="TH">ปริมาตรของสารละลายที่</span> 1 , <span lang="TH">ที่</span> 2 <span lang="TH">และ สารละลายรวม ตามลำดับ</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">การเปลี่ยนความเข้มข้น
จากแบบร้อยละไปเป็นโมล</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">กรณีที่</span><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">
1 <span lang="TH">สูตรเปลี่ยนจากร้อยละ โดยมวล หรือ โดยปริมาตร เป็นโมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">c = </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">%M10D<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">กรณีที่
</span><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">2 <span lang="TH">สูตรเปลี่ยนจากร้อยละ โดยมวล</span>/<span lang="TH">ปริมาตร
เป็น โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">c = </span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">%M10<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">
c = <span lang="TH">ความเข้มข้นเป็น โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">10<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">D = <span lang="TH">ความหนาแน่นสารละลาย</span> (g/cm3)<o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">M = <span lang="TH">มวลโมเลกุลตัวถูกละลาย</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">3. <span lang="TH">โมลต่อกิโลกรัมตัวถูกละลาย</span> (mol/kg) (<span lang="TH">โมลแลล</span>)
(m)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">บอกจำนวนโมลตัวถูกละลายที่มีในตัวทำละลาย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
1 <span lang="TH">กิโลกรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เช่น
สารละลาย ยูเรียเข้มข้น</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 3 mol/kg <span lang="TH">ตัวทำละลาย หมายความว่า</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มียูเรีย</span><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3 <span lang="TH">โมล ละลายในตัวทำละลาย</span> 1 <span lang="TH">กิโลกรัม</span><o:p></o:p></span></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สมการแสดงความสัมพันธ์ของความเข้มข้นแบบ
โมล</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">/<span lang="TH">ลิตร กับ โมแลล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">D
= c (1000 M + m 1 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
D = <span lang="TH">ความหนาแน่น</span> (g/cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">c
= <span lang="TH">ความเข้มข้น</span> (<span lang="TH">โมล</span>/<span lang="TH">ลิตร</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M
= <span lang="TH">มวลโมเลกุลตัวถูกละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">m
= <span lang="TH">ความเข้มข้น</span> (<span lang="TH">โมแลล</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">18. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อละลายน้ำตาลกลูโคส</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 30 <span lang="TH">กรัม
ในน้ำกลั่น</span> 120 <span lang="TH">กรัม จงหาว่าสารละลายนี้มีความเข้ม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ข้นโดยมวลเท่าใด
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(20%)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">18. <span lang="TH">ตอบ</span> 20%<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก ร้อยละโดยมวลต่อปริมาตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = <span lang="TH">มวลสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลตัวถูกละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1203 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">+</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0
30 x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
20<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">19(<span lang="TH">มช</span> 39) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะต้องเติมน้ำตาลทรายกี่กรัม
ลงในสารละลายน้ำตาลเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 5% <span lang="TH">โดยมวล
จำนวน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">200
<span lang="TH">กรัม เพื่อให้ได้สารละลายเข้มข้น</span> 20% <span lang="TH">โดยมวล </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(37.50 <span lang="TH">กรัม</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">19(<span lang="TH">มช</span> 39) <span lang="TH">ตอบ</span> 37.5 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">1 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 5% <span lang="TH">โดยมวล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละโดยมวลต่อมวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= <span lang="TH">มวลสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลตัวถูกละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">5
= </span></b><b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">มวล</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">2<span lang="TH">น</span>0<span lang="TH">้ำ</span>0<span lang="TH">ตาล </span></span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x
100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลน้ำตาล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= 10 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 12.0pt;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">11<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ทีนี้
ต้องการเปลี่ยนความเข้มข้นเป็น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 20% <span lang="TH">โดยมวล
สมมุติเติมน้ำตาลเข้าไปอีก</span> X <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สุดท้ายจึงมีสารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
200 + X <span lang="TH">กรัม และมีน้ำตาล</span> 10 + X <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละโดยมวลต่อมวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= <span lang="TH">มวลสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลตัวถูกละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">20
= </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">21000
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">+ </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">XX<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">+ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">X
= 37.5 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;">
</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;">
</span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"> </span></b><b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">20. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อใช้ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">NaOH 20 <span lang="TH">กรัม เตรียมสารละลายให้มีความเข้มข้น</span>
30% <span lang="TH">โดยมวล</span>/<span lang="TH">ปริมาตร จะได้</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายกี่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
cm3 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(66.67
cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">20. <span lang="TH">ตอบ</span> 66.67 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์ มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> NaOH = 20 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ความเข้มข้นโดยมว</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
/<span lang="TH">ปริมาตร</span> = 30%<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
% <span lang="TH">โดยมวล</span>/<span lang="TH">ปริมาตร</span> = </span></b><b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">ปริมาตรสารละลาย</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> (cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">มวลตัวถูกละลาย</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> (<span lang="TH">กรัม</span>)
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">30
=<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">ปริมาตร</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">20 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x
100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">∴ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น ปริมาตรสารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= 66.67 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">21. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โพแทสเซียมแมงกาเนต</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> ( K2MnO4 ) <span lang="TH">จำนวน</span> 59.1 <span lang="TH">กรัม ละลายในสารละลาย</span> 100 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายนี้มีความเข้มข้นกี่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
mol / dm3 ( K=39 , Mn=55 , O=16 ) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(3 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">21. <span lang="TH">ตอบ</span> 3 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์ มวลโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> (M) = K2MnO4 = 2(39)
+ 55 + 4(16) = 197<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g
= 59.1 <span lang="TH">กรัม</span>, V = 100 cm3 , C = ?<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสูตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">g
= 1C0V00<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">5199.71
= C1 x0 01000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C
= 3 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 12.0pt;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">12<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">22. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">เมื่อผ่านแก๊สไฮโดรเจนคลอไรด์</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;"> (HCl) 5.6 dm3 <span lang="TH">ที่</span> STP <span lang="TH">ลงในน้ำกลั่นเป็นสารละลาย</span> 300<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">cm3
<span lang="TH">ถ้าได้แก๊สไฮโดรเจนคลอไรด์ละลายทั้งหมด จะได้สารละลายเข้มข้นกี่โมล</span>
/ <span lang="TH">ลิตร </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 0.83 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">22. <span lang="TH">ตอบ</span> 0.83 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> V</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แก๊ส
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 5.6 </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">, V</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">สารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 300 </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">cm3
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">mol/l , C = ?<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสูตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2<span lang="TH">แ</span>2<span lang="TH">ก</span>.4<span lang="TH">๊ส</span> V<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1C0V00<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">252..64
= C1 x0 03000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C
= 0.83 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">23. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มี</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> NaOH 1 mol/dm3 <span lang="TH">อยู่</span> 500
cm3 <span lang="TH">แบ่งมา</span> 100 cm3 <span lang="TH">ทำให้เจือจางเป็น</span> 1
<span lang="TH">ลิตร สาร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ละลายนี้เข้มข้นเท่าใด
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(
0.1 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span> )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">23. <span lang="TH">ตอบ</span> 0.1 <span lang="TH">โมล</span>/<span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 100 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= ? V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1000 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1
x 100 = C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x 1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 0.1 mol/dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">24. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายชนิดหนึ่ง</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 100 cm3 <span lang="TH">เข้มข้น</span> 3 mol/dm3 <span lang="TH">ต้องการเตรียมให้เข้มข้นเป็น</span>
2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">mol/dm3
<span lang="TH">จะต้องเติมน้ำจนมีปริมาตรเท่าใด </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(150 cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">24. <span lang="TH">ตอบ</span> 150 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> V1 = 100 cm3 C1 = 3 mol/ dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V2
= ? C2 = 2 mol/ dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3
x 100 = 2 x V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 150 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 12.0pt;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">13<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC-Bold","serif"; font-size: 16.0pt; mso-bidi-font-family: AngsanaUPC-Bold;">25. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ผสมสาระลายกรด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl <span lang="TH">ขวดที่</span> 1 <span lang="TH">ซึ่งมีความเข้มข้น</span> 1 mol/
dm3 <span lang="TH">จำนวน</span> 300 cm3 <span lang="TH">กับ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">HCl
<span lang="TH">ขวดที่</span> 2 <span lang="TH">ซึ่งมีความเข้มข้น</span> 2 mol/ dm3
<span lang="TH">จำนวน</span> 200 cm3 <span lang="TH">แล้วเติมน้ำลงไปอีก</span> 500<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">cm3
<span lang="TH">ถามว่าสารละลายผสมที่ได้จะมีความเข้มข้นกี่</span> mol/ dm3 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 0.7 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">25. <span lang="TH">ตอบ</span> 0.7 mol /dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 300 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 2 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 200 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">H</span></b><b><span style="font-family: AngsanaNew; font-size: 8.5pt; mso-hansi-font-family: AngsanaNew;">2</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">O
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 500 cm3 C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
?<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
V</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 300 + 200 +
500 = 1000 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสูตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">+ C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(1000) = 1(300) + 2(200)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1700000 = 0.7 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">26(<span lang="TH">มช</span> 45) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มีขวดบรรจุสารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl 2 <span lang="TH">ใบ ใบที่</span> 1 <span lang="TH">มี</span> HCl <span lang="TH">เข้มข้น</span> 0.50 mol/dm3 <span lang="TH">อยู่</span> 5.0<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">dm3
<span lang="TH">ใบที่</span> 2 <span lang="TH">มี</span> HCl <span lang="TH">เข้มข้น</span>
0.10 mol/dm3 <span lang="TH">อยู่</span> 5.0 dm3 <span lang="TH">ถ้าต้องการเตรียมสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">HCl
<span lang="TH">เข้มข้น</span> 0.20 mol/dm3 <span lang="TH">โดยการนำ</span> HCl <span lang="TH">จากขวดใบที่</span> 1 <span lang="TH">มา</span> 0.5 dm3 <span lang="TH">แล้วจะต้องนำ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">HCl
<span lang="TH">จากขวดใบที่</span> 2 <span lang="TH">จำนวนกี่ </span>dm3 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 1.5 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">26(<span lang="TH">มช</span> 45) <span lang="TH">ตอบ</span> 1.5 dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C1 = 0.5 mol/dm3 V1 = 0.5 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C2
= 0.1 mol/dm3 V2 <span lang="TH">สมมติเป็น</span> A dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C<span lang="TH">รวม</span> = 0.2 mol/dm3 V<span lang="TH">รวม</span> = 0.5 + A dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C<span lang="TH">รวม</span> V<span lang="TH">รวม</span> = C1 V1 + C2 V2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(0.2)
(0.5 + A) = 0.5 (0.5) + 0.1 A<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0.1
+ 0.2 A = 0.25 + 0.1A<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">A = 1.5 dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แสดงว่า
ต้องใช้สารจากขวดหลัง</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 1.5 dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">27. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อผสม</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> NaCl 2 mol/dm3 <span lang="TH">จำนวน</span>
10 cm3 <span lang="TH">กับ</span> 4 mol/dm3 <span lang="TH">จำนวน</span> 100 cm3 <span lang="TH">แล้วเติม</span> NaCl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อีก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
175.5 g <span lang="TH">แล้วเติมน้ำจนมีปริมาตร</span> 500 cm3 <span lang="TH">จงหาความเข้มข้นสารผสม
</span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(6.84
mol/dm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 12.0pt;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">14<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">27. <span lang="TH">ตอบ</span> 6.84 mol /dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 2 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 10 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 4 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 100 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 18.0pt; mso-hansi-font-family: AngsanaNew;">g</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">3
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 175.5 <span lang="TH">กรัม</span> => </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
C1030V03<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">3
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1000 x </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C<span lang="TH">รวม</span> = ? V<span lang="TH">รวม</span> = 500 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสูตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">1
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">+ C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">2
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">+ C</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(500) = 2(10) + 4(100) + 100 x </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">m<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">g<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 500 58.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">20
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">+ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">400
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew-Bold;">+ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">100
x 175.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">C</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">รวม</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;"> = </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6.84 mol/ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">28(<span lang="TH">มช</span> 50) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
NaOH <span lang="TH">เข้มข้น</span> 6.0 M <span lang="TH">มีความหนาแน่น</span> 1.24
g/cm3 <span lang="TH">จะมีความเข้มข้น</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">คิดเป็นร้อยละโดยมวลเท่ากับเท่าไร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
0.15 2. 1.86 3. 19.35 4. 24.00 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">28(<span lang="TH">มช</span> 50) <span lang="TH">ตอบ ข้อ</span> 3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C = 6 M , D = 12.4 g /</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">cm3
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">% <span lang="TH">โดยมวล</span> = ?<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุลของ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
NaOH = 23 + 16 1 40<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C = % 1M0 D<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้ว่า</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
6 = 40<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">%
(10) (12.4)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">%
<span lang="TH">โดยมวล</span> = 19.35<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew-Bold;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">29(<span lang="TH">มช</span> 46) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กรดเกลือเข้มข้นมีปริมาณ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl = 36.5% <span lang="TH">โดยน้ำหนักและมีความหนาแน่นเท่ากับ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.18
g/cm3 <span lang="TH">ถ้าต้องการเตรียมสารละลาย</span> HCl <span lang="TH">ที่มีความเข้มข้นเท่ากับ</span>
0.236 mol/dm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะต้องนำกรดเกลือเข้มข้นกี่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
cm3 <span lang="TH">มาเติมน้ำกลั่นจนมีปริมาตรทั้งหมดเท่ากับ</span> 100.0 cm3 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 2 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 12.0pt;">Chem Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com </span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">. <span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">15<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">29. <span lang="TH">ตอบ</span> 2 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โจทย์บอก ความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> HCl <span lang="TH">แบบ</span>
% <span lang="TH">โดยมวล</span> = 36.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl ( m ) = 35.5 + 1 = 36.5 , D = 1.18 g/cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ขั้นแรก </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ต้องทำความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> HCl 36.5% <span lang="TH">ให้เป็น โมล</span> / <span lang="TH">ลิตร ก่อน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C = </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">%
( 1m0 ) D </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">36.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">36.5(10)(1.18)
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">=
11.8 mol / dm</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ขั้น</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C1 V1 = C2 V2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">11.8
V1 = 0.236 (100 cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">V1 = 2 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">นั่นคือต้องใช้สารละลาย</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> HCl 2 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">30(<span lang="TH">มช</span> 41) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายกรดไฮโดรคลอริกเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
36.5% <span lang="TH">โดยมวล มีความหนาแน่น</span> 1.15 g/cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้าต้องการเตรียมกรดไฮโดรคลอริกที่มีความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
0.345 mol/dm3 <span lang="TH">จำนวน</span> 500 cm3 <span lang="TH">จะ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ต้องใช้กรดไฮโดรคลอริกกี่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
cm3 (H = 1 , Cl = 35.5)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
0.5 2. 1.5 3. 15 4. 150 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">30(<span lang="TH">มช</span> 41) <span lang="TH">ตอบข้อ</span> 3.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ขั้นแรก </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ต้องทำความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> HCl 36.5% <span lang="TH">ให้เป็น โมล</span> / <span lang="TH">ลิตร ก่อน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C = </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">%
( 1m0 ) D </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">36.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">36.5(10)(1.15)
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">=
11.5 mol / dm</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ขั้น</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C1 V1 = C2 V2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">11.5
V1 = 0.345 (500 cm3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">V1 = 15 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">นั่นคือต้องใช้สารละลาย</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> HCl 15 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">31(<span lang="TH">มช</span> 51) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อใช้น้ำบริสุทธ์ิ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
100 cm3 <span lang="TH">ที่</span> 4oC <span lang="TH">เตรียมสารละลายกรดไฮโดรคลอริกความหนา</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แน่น
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.175 g/cm3 <span lang="TH">ที่มีเนื้อกรดไฮโดรคลอริก</span> 34.4% <span lang="TH">โดยน้ำหนัก จะเตรียมสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กรดไฮโดรคลอริกได้กี่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">16<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 4 <span lang="TH">สมบัติคอลลิเกตีฟ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สมการที่ใช้คำนวณเกี่ยวกับสมบัติคอลลิเกตีฟ</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">Δ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">T = T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= kb m<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">Δ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">T = T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แข็งตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= kf m<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">
kb = <span lang="TH">ค่าคงที่การเพิ่มขึ้นของจุดเดือด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">kf
= <span lang="TH">ค่าคงที่การลดของจุดเยือกแข็ง</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">m
= <span lang="TH">ความเข้มข้นของสารละลายหน่วยเป็นโมลแลล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">และ
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">Δ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">T
= T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">–
T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kb ( . M w2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">w1.
1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">Δ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">T = T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แข็งตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">แข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= kf ( . M w2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">w1.
1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">32(<span lang="TH">มช</span> 39) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารประกอบที่ระเหยยาก และไม่แตกตัวมีมวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
5 <span lang="TH">กรัม เมื่อนำไปละลายน้ำ</span> 500<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กรัม
ปรากฏว่าสารละลายที่ได้มีจุดเดือด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 100.10oC <span lang="TH">มวลโมเลกุลของสารประกอบนี้มีค่า</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เท่ากับ
เท่าใด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> (<span lang="TH">กำหนด</span> Kb <span lang="TH">ของน้ำ</span> = 0.50o C/mol/kg) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(50.00)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">32(<span lang="TH">มช</span> 39) <span lang="TH">ตอบ</span> 50<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดสารละลาย
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kb </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">W2
M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">W1
1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">100.1
– 100 = 0.50</span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">(</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">5501000M0</span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">) </span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">M
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">=
50<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">33(<span lang="TH">มช</span> 42) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ในการทดลองครั้งหนึ่ง เมื่อละลายสาร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">A
2.76 g <span lang="TH">ในเอทานอล</span> 10 g <span lang="TH">พบว่าสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มีจุดเดือด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
82.16oC <span lang="TH">จงหามวลโมเลกุลของสาร</span> A (<span lang="TH">กำหนดให้ จุดเดือดของเอทานอลเท่ากับ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">78.50oC
<span lang="TH">ค่าคงที่ของการเพิ่มของจุดเดือด</span> (Kb) <span lang="TH">ของเอทานอลเท่ากับ</span>
1.22oC / (mol/kg)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">33(<span lang="TH">มช</span> 42) <span lang="TH">ตอบ</span> 92<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดสารละลาย
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kb </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">W2
M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">W1
1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">m
= <span lang="TH">มวลตัวทำละลาย</span>(kg)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จำนวนโมลตัวถูกละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">หรือ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
m = . M w2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">w1.
1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อ</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">
w1 <span lang="TH">คือ มวลตัวถูกละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">w2
<span lang="TH">คือ มวลตัวทำละลา</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">M
<span lang="TH">คือ มวลโมเลกุลตัวถูกละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">17<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">82.16
– 78.5 = 1.22 </span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">(</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2.7160
1M000</span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">) </span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">M = 92<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">34(<span lang="TH">มช</span> 36) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายชนิดหนึ่งประกอบด้วยตัวทำละลายที่มีจุดเดือดอยู่ที่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
61.70o C <span lang="TH">และตัว</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถูกละลายที่มีมวลโมเลกุลเท่ากับ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
500 <span lang="TH">เมื่อนำเอาสารละลายนี้มาหาจุดเดือดปรากฏว่าได้จุด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เดือดอยู่ที่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
62.20o C <span lang="TH">จงหาว่าในสารละลายนี้</span> 100 <span lang="TH">กรัม จะมีตัวถูกละลายอยู่กี่กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กำหนดค่า</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Kb <span lang="TH">ของตัวทำละลายเท่ากับ</span> 5.00oC Kg/mol </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(4.76 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">34(<span lang="TH">มช</span> 36) <span lang="TH">ตอบ</span> 4.762 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สมมุติ มีมวลตัวถูกละลายเป็น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
มวลตัวทำละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = 100 – A <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">–
T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เดือดตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kb </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W2 M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W1 1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">62.20
– 61.70 = 5.00 </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">(10A0
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">− </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">A 1)0 0 0500<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">A = 4.762 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">35(<span lang="TH">มช</span> 40) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้าสารละลายซูโครส</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
(C12H22O11) 342 <span lang="TH">กรัม ในน้ำ</span> 1 <span lang="TH">กิโลกรัม มีจุดเยือกแข็ง</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">–1.8oC
<span lang="TH">สารละลายที่มีซูโครส</span> 114 <span lang="TH">กรัม ในน้ำ</span>
500 <span lang="TH">กรัม จะมีจุดเยือกแข็งอยู่ที่กี่</span> oC<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
–1.0 2. –1.2 3. –1.6 4. –1.8 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">35(<span lang="TH">มช</span> 40) <span lang="TH">ตอบข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ตอนแรก </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งตัวทำ
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kf </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W2 M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W1 1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0
– (–1.8) = kf </span></b><b><span style="font-family: SymbolMT; font-size: 26.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">( ) </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(1000)(342)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(342)(1000)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">kf = 1.8<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอนหลัง </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งตัวทำ
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kf </span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎟⎠</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎞</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎜⎝</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Cambria Math","serif"; font-size: 12.0pt; mso-bidi-font-family: "Cambria Math"; mso-fareast-font-family: SymbolMT;">⎛</span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">×<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W2 M<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">W1 1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0
– T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1.8</span></b><b><span style="font-family: SymbolMT; font-size: 26.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">( ) </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(500)
(342)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(114)
(1000)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">= 1.2oc<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">18<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">36(<span lang="TH">มช</span> 50) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารละลายที่มีน้ำเป็นตัวทำละลายและมีความเข้มข้นเป็น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
0.100 <span lang="TH">โมลต่อกิโลกรัม มี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จุดเยือกแข็งเป็น
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">–0.60 <span lang="TH">องศาเซลเซียส ตัวถูกละลายในสารละลายดังกล่าวจะเป็นสารใด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(
<span lang="TH">กำหนดค่า</span> Kf <span lang="TH">ของน้ำบริสุทธ์ิ</span> 1.86oC/m)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
MgCl2 2. CuSO4 3. LiCl 4. Na3 PO4 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 4)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">36(<span lang="TH">มช</span> 50) <span lang="TH">ตอบข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากโจทย์ ความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> (m) = 0.1 mol /Kg T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= - 0.6 oC<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งตัวทำละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">–
T</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">เยือกแข็งสารละลาย </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
kf mI<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">0
– (- 0.6) = (1.86)(0.1)I<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">I
= 3.22<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">I
</span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">≈ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 5 <span lang="TH">สูตรเคมี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">37(<span lang="TH">มช</span> 44) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้านำ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C 6 <span lang="TH">กรัม รวมกับ</span> H 1 <span lang="TH">กรัม และ</span> S 8 <span lang="TH">กรัม จะได้สารประกอบชนิด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">หนึ่งที่มีมวลโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
180 <span lang="TH">กรัม สูตรโมเลกุลของสารประกอบนี้ คือข้อใด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
C6 H12 S3 2. C2 H4 S 3. C3 H6 S3 4. CH2 S </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">37(<span lang="TH">มช</span> 44) <span lang="TH">ตอบ ข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 1 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วนโดยมวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> C : H : S = 6 : 1 : 8<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วนโดยอะตอม</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C : H : S = 12 6 : 1 1 : 32 8<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
0.5 : 1 : 0.25<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วนโดยอะตอม</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C : H : S = 2 : 4 : 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
</span></b><b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สูตรอย่างง่าย</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> = C2H4S<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ต่อไป </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(<span lang="TH">มวลจากสูตรอย่างง่าย</span>) n = <span lang="TH">มวลโมเลกุล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(C2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">H4S)n
= 180<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">60
n = 180<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">n = 3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">แสดงว่าสูตรโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= (C2H4S)n = (C2H4S)3 = C6H12S3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">19<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">38(<span lang="TH">มช</span> 43) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารอย่างหนึ่งประกอบด้วยธาตุคาร์บอน
ไฮโดรเจน และคลอรีน จากการทดลองเมื่อ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นำสารนี้มา</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
125 <span lang="TH">กรัม วิเคราะห์พบว่ามี</span> C <span lang="TH">อยู่</span> 48 <span lang="TH">กรัม และไฮโดรเจน</span> 6 <span lang="TH">กรัม สูตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เอมพิริคัลของสารนี้เป็นอย่างไร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
( <span lang="TH">กำหนดให้</span> : C = 12 , H = 1 , Cl = 35.5 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
C2H3Cl 2. C8HCl12 3. C4H3Cl2 4. C4<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">H6Cl
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">38(<span lang="TH">มช</span> 43) <span lang="TH">ตอบข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลสารทั้งหมด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = 125 <span lang="TH">กรัม</span>
, <span lang="TH">มวล</span> C = 48 <span lang="TH">กรัม</span> , <span lang="TH">มวล</span>
= 6 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
มวลออกซิเจน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> O = 125 – 48 – 6 = 71<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C : H : Cl = 48 : 6 : 71 <span lang="TH">โดยมวล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1428 : 16 : 3751.5 <span lang="TH">โดยอะตอม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
4 : 6 : 2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">C : H : Cl = 2 :
3 : 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">สูตรเอมพิริคัล คือ</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> C2H3Cl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">39(<span lang="TH">มช</span> 39) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A 2 <span lang="TH">อะตอม มีมวลเท่ากับ</span> 1.824 x 10–22 <span lang="TH">กรัม สารประกอบของออกไซด์</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ของ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">ประกอบด้วย</span> A 72.03% <span lang="TH">และออกซิเจน</span>
27.97% <span lang="TH">โดยมวล สารประกอบนี้จะมี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สูตรอย่างง่ายเป็น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
( <span lang="TH">กำหนดให้</span> 12 1 <span lang="TH">มวลของ</span> C – 12 <span lang="TH">เท่ากับ</span> 1.66x10–24 <span lang="TH">กรัม</span> )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
A2O3 2. A2O5 3. A3O4 4. AO2 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">39(<span lang="TH">มช</span> 39) <span lang="TH">ตอบ ข้อ</span> 3.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A 2 <span lang="TH">อะตอม</span> = 1.824 x 10–22
<span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A 1 <span lang="TH">อะตอม</span> = </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">1824 10 22<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">. </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">× − </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 9.12 x 10–23 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น
มวลอะตอม</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> A = </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">9.12 10 23<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">166 10 24<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">× −<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">. </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">× − </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 55<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ต่อไป หาสูตรอย่างง่าย</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วนโดยมวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">: </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">O
= 72.03 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">: </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">27.97<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อัตราส่วนโดยอะตอม</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
= </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">72.03<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">55<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">27.97<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">: 16<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1.309 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">: </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.748<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">: </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.33<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
3 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">: </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">4<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">20<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ดังนั้น สารประกอบนี้จะมีสูตรอย่างง่ายเป็
น</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">
A3O4<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 6 <span lang="TH">การหามวลร้อยละจากสูตรโมเลกุล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สูตรการหามวลร้อยละของสาร
จากสูตรโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ร้อยละของสาร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
=<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลทั้งหมด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลสาร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">40. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จงหามวลร้อยละของธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> O <span lang="TH">ใน</span>
CuSO4 . 5H2O (Cu = 63.5 , S = 32) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(57.72%</span></b><b><span style="font-family: "CordiaUPC-Bold","sans-serif"; font-size: 14.0pt; mso-bidi-font-family: CordiaUPC-Bold;">)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">40. <span lang="TH">ตอบ</span> 57.72%<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลโมเลกุล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> CuSO4 . 5H2O = 63.5 + 32 + 4(16)
+ 5[2(1) + 16]<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
249.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O = <span lang="TH">มวลทั้งหมด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
214494.5 x 100 = 57.72<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">41. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากข้อที่ผ่านมา จงหามวลร้อยละของน้ำ </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 36.07%</span></b><b><span style="font-family: "CordiaUPC-Bold","sans-serif"; font-size: 14.0pt; mso-bidi-font-family: CordiaUPC-Bold;">)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">41. <span lang="TH">ตอบ</span> 36.07%<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากข้อที่ผ่านมา มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> CuSO4 . 5H2O = 249.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
H2O = 5(18) = 90<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
% <span lang="TH">มวล</span> H2O = <span lang="TH">มวลทั้งหมด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">x
100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
24990.5 x 100 = 36.07<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">42(<span lang="TH">มช</span> 35) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สารประกอบอย่างหนึ่งมีสูตรเป็น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X2CO3 . 10 H2O <span lang="TH">จากการทดลองพบว่า มีมวล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">น้ำผลึกทั้งหมด</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
60% <span lang="TH">มวลอะตอมของ</span> X <span lang="TH">เท่ากับเท่าใด</span> (C=12
, O=16 , H=1) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(30.00)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">42(<span lang="TH">มช</span> 35) <span lang="TH">ตอบ</span> 30<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สมมติ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> X <span lang="TH">มีมวลอะตอม</span> = A<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X2CO3 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">. </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">10H2O
<span lang="TH">มีมวลโมเลกุล</span> = 2A + 12 + 48 + 180 = 2A + 240<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">และ
ในโมเลกุลจะมีน้ำอยู่</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = 10H2O = 10 (18) = 180<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ทีนี้โจทย์บอก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X2CO3 . 10H2O <span lang="TH">มี</span> H2O = 60%<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">21<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
ร้อยละของน้ำ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = <span lang="TH">มวลทั้งหมด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลน้ำ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">60
= 2A1 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">+</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">80
240 x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">A = 30<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">นั่นคือ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">X
<span lang="TH">มีมวลอะตอม</span> = 30<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">43(<span lang="TH">มช</span> 40) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สาร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">เป็นสารบริสุทธ์ิ โดยใน</span> 1 <span lang="TH">โมเลกุลของสารนี้ประกอบด้วยคาร์บอน</span>
27<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">อะตอม
คิดเป็นร้อยละโดยมวลของคาร์บอนเท่ากับ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 80.50 <span lang="TH">อยากทราบว่าสาร</span>
A <span lang="TH">มีมวล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมเลกุลเท่าไร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
348.3 2. 402.5 3. 430.3 4. 490.8 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">43(<span lang="TH">มช</span> 40) <span lang="TH">ตอบข้อ</span> 2.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สมมุติสารประกอบนี้มีคาร์บอน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 27 <span lang="TH">อะตอม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังนั้นเฉพาะมวลคาร์บอน
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 27 x 12 = 324<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก
ร้อยละของคาร์บอน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> = <span lang="TH">มวลโมเลกุล</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">มวลคาร์บอน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">80.5
= m 324 x 100<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">m = 402.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 7 <span lang="TH">สมการเคมี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">44. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จงดุลสมการเคมีต่อไปนี้โดยใช้วิธีตรวจพินิจ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">1.
Fe2O3 + H2 </span></b><b><span style="font-family: SymbolMT; font-size: 15.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">Fe
+ H2O </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">(
Fe2 O3 + 3H2 </span></b><b><span style="font-family: SymbolMT; font-size: 15.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">2Fe + 3 H2O )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">2.
Fe2O3 + C </span></b><b><span style="font-family: SymbolMT; font-size: 15.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">Fe
+ CO2 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">(
2Fe2 O3 + 3C </span></b><b><span style="font-family: SymbolMT; font-size: 15.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">4Fe + 3CO2 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">3.
PCl5(l) + H2O(l) </span></b><b><span style="font-family: SymbolMT; font-size: 15.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.0pt; mso-hansi-font-family: AngsanaNew;">H3PO4(aq)
+ HCl(aq) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 13.0pt;">(
PCl5(l) + 4H2O(l) </span></b><b><span style="font-family: SymbolMT; font-size: 13.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 13.0pt;">H3PO4 (aq) +
5HCl(aq) )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">22<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">45. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">ในการเผา</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;"> KClO3 <span lang="TH">จะเกิดปฎิกิริยาดังนี้</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2KClO3
</span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2KCl
+ 3O2 (K = 39.1 , Cl = 35.5 , O = 16)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">ถ้าเผา</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
KClO3 <span lang="TH">จำนวน</span> 12.26 <span lang="TH">กรัม จะได้แก๊ส</span> O2 <span lang="TH">กี่ลิตรที่</span> STP </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.0pt;">(3.36 <span lang="TH">ลิตร</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">45. <span lang="TH">ตอบ</span> 3.36 <span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสมการ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2KClO3 </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2KCl + 3O2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">จะเห็นได้ว่า
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">32<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
O3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
KClO3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">และเนื่องจาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3<span lang="TH">โมล </span></span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">KClO3 = 2<span lang="TH">โมล</span> O2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3
( m g )</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">KClO3 </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 2( 2<span lang="TH">แ</span>2<span lang="TH">ก</span>.4<span lang="TH">๊ส</span> V<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">O2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3
( 1122.22.66 ) </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2( 2<span lang="TH">แ</span>2<span lang="TH">ก</span>.4<span lang="TH">๊ส</span> V<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">O</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">∴ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">V<span lang="TH">แก๊ส</span>
O2 = 3.36 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ลิตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">46(<span lang="TH">มช</span> 42) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">ปฏิกิริยาระหว่าง</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
X <span lang="TH">กับ</span> Y <span lang="TH">เป็นไปตามสมการ</span> 2X + 3Y </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2A + 3B<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">ถ้าใช้สารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
X 100 cm3 <span lang="TH">ซึ่งเตรียมจากสาร</span> X 0.20 <span lang="TH">กรัม ละลายน้ำจนเป็นสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">100
cm3 <span lang="TH">จะทำปฏิกิริยาพอดีกับสารละลาย</span> Y <span lang="TH">ที่มีความเข้มข้น</span>
0.10 mol/dm3 <span lang="TH">จำน</span></span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">วน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">20
cm3 <span lang="TH">จงหามวลโมเลกุลของสาร</span> X </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 150 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">46(<span lang="TH">มช</span> 42) <span lang="TH">ตอบ</span> 150<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 2 X + 3Y </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2 A + 3 B<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะเห็นว่า</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
32<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Y<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X </span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">และเนื่องจาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3 <span lang="TH">โมล</span> X = 2 <span lang="TH">โมล</span> Y<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3
( m g ) = 2 (1C0V00 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3
0m.2 </span></b><b><span style="font-family: SymbolMT; font-size: 12.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2(0.1)20<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">m = 150<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">23<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">47(<span lang="TH">มช</span> 38) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">สมการแสดงปฏิกิริยาการเผาไหม้ของสาร</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">อย่างสมบูรณ์ เขียนได้ดังนี้</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2
A + 17 O2 </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">12
CO2 + 10 H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">สูตรโมเลกุลของสาร</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">ควรเป็นแบบใด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">1.
C4H6 2. C4<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">H10
3. C6<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">H10
4. C6H12 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">(<span lang="TH">ข้อ</span> 3)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">47(<span lang="TH">มช</span> 38) <span lang="TH">ตอบ</span> 3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">วีธีทำ
จากสมการ</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;"> 2A + 17O2 </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">12CO2 + 10H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">จะได้ว่า</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
2(CxHy)+ 10H2O </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">12CO2
+ 10H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
12CO2 + 10H2O <span lang="TH">มี</span> C = 12 <span lang="TH">ตัว</span> H = 20 <span lang="TH">ตัว</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">∴ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">2(C6H10)+ 17O2 </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">12CO2 + 10H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫</span></b><b><span style="font-family: "Cambria Math","serif"; font-size: 6.0pt; mso-bidi-font-family: "Cambria Math";">⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">48(<span lang="TH">มช</span> 47) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">การแยกตกตะกอนของเงินออกจากสารละลายซิลเวอร์ไนเตรตทำได้โดยการเติมกรด</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">เกลือลงไป
ซึ่งจะทำให้เกิดปฏิกิริยาได้ตะกอนของ ซิลเวอร์คลอไรด์ ดังนี้คือ</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">AgNO3(aq)
+ HCl(aq) </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">AgCl(s)
+ HNO3(aq)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">หากต้องการใช้สารละลายกรดเกลือที่มีความเข้มข้นเท่ากับ</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
37% <span lang="TH">โดยน้ำหนัก และมีความ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">หนาแน่นเท่ากับ</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
1.017 <span lang="TH">กรัมต่อลูกบาศก์เซนติเมตร ในการตกตะกอนของซิลเวอร์คลอไรด์</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">จากสารละลายซิลเวอร์ไนเตรตความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
0.50 <span lang="TH">โมลต่อลิตร ปริมาตร</span> 25.00 <span lang="TH">ลูกบาศก์</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">เซนติเมตรอย่างสมบูรณ์
จะต้องใช้สารละลายกรดเกลืออย่างน้อยกี่ลูกบาศก์เซนติเมตร </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(1.21)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">48(<span lang="TH">มช</span> 47) <span lang="TH">ตอบ</span> 1.21 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 1 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โจทย์บอก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> % HCl = 37 , DHCl = 1.017 g / cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">หาความเข้มข้นเป็นโมลต่อลิตร
โดย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จาก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
C = </span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">%
( 1m0 ) D </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">36.5<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 16.0pt;">37(10)(1.017) </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">10.3
mol / dm</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">ตอน</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> 2 </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากปฏิกิริยา</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> Ag NO3 + HCl </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">AgCl + HNO3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้ว่า
โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> AgNO3 = <span lang="TH">โมล</span> HCl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">( )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1000
AgNO3 cv = </span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">(</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">10c0v0</span></b><b><span style="font-family: SymbolMT; font-size: 22.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">HCl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(0.5)
(25) = 10.3 V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">HCl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">HCl
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 1.21 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นั่นคือปริมาตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl <span lang="TH">เท่ากับ</span> 1.21 <span lang="TH">ลูกบาศก์เซนติเมตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">24<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 15.5pt;">49(<span lang="TH">มช</span> 36) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">สารละลายที่มี</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
CaCl2 <span lang="TH">ถูกเติมลงในสารละลายของ</span> AgNO3 <span lang="TH">เตรียมสารละลาย</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">AgNO3
<span lang="TH">โดยละลาย</span> Ag 2.16 <span lang="TH">กรัม ลงในกรดไนตริก จงหามวลเป็นกรัมของแคลเซียม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">คลอไรด์ในสารละลาย
ถ้าแคลเซียมคลอไรด์ทั้งหมดทำปฏิกิริยาพอดีกับสารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
AgNO3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">เกิด</span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">
AgCl<span lang="TH">ปฏิกิริยาที่เกิดขึ้นมีดังนี้</span> ( <span lang="TH">สมการยังไม่ได้ดุล</span>
)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">(1)
Ag(s) + HNO3 (aq) </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">AgNO3
(aq) + NO2 (g) + H2 O(1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">(2)
AgNO3 (aq) + CaCl2 (aq) </span></b><b><span style="font-family: SymbolMT; font-size: 15.5pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">AgCl(s)
+ Ca(NO3 )2 (aq)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 15.5pt; mso-hansi-font-family: AngsanaNew;">(<span lang="TH">ใช้</span> Ag = 108 , Ca = 40 , Cl = 35.5) </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(1.11)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">49(<span lang="TH">มช</span> 36) <span lang="TH">ตอบ</span> 1.11 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เมื่อดุลสมการจะได้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2Ag
+ 4HNO3 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2AgNO3
+ 2NO2 + 2H2O<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2AgNO3
+ CaCl2 </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2AgCl
+ Ca(NO3)2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะเห็นว่าใน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
2 <span lang="TH">สมการนี้ มีจำนวน</span> AgNO3 <span lang="TH">เท่ากันแล้ว จึงไม่ต้องปรับแต่งอีก</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสมการจะได้
</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">12<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">โมล</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> CaCl2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">โมล</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;"> Ag </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">=<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Ag = 2 <span lang="TH">โมล</span> CaCl2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(
</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">m
g </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;">เงิน
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">= 2 (</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">m
g </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;">แคลเซียมคลอไรด์</span></b><b><span style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(
</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">21.0186
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;">เงิน </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
2 (</span></b><b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">111<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaUPC","serif"; font-size: 16.0pt;">g </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">)</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;">แคลเซียมคลอไรด์</span></b><b><span style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">g</span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 13.0pt; mso-hansi-font-family: AngsanaNew;">แคลเซียมคลอไรด์ </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">= 1.11 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">นั่นคือมวล</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;"> CaCl2 <span lang="TH">ที่ใช้ คือ</span> 1.11 <span lang="TH">กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">50(<span lang="TH">มช</span> 47) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ในการทดลองครั้งหนึ่งได้นำโลหะแคลเซียมหนัก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
0.65 <span lang="TH">กรัม ใส่ลงไปในสาร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ละลายกรดเกลือที่มีความเข้มข้น</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
3.50 <span lang="TH">โมลต่อลิตร ปริมาตร</span> 8.0 cm3 <span lang="TH">พบว่ามีก๊าซไฮโดรเจน</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เกิดขึ้นดังปฏิกิริยาต่อไปนี้
</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Ca(s) + HCl(aq) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">CaCl2(aq) + H2 (g) <span lang="TH">จงคำนวณ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">หาปริมาตรของก๊าซไฮโดรเจนที่เกิดขึ้นในหน่วยลิตรที่สภาวะ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
STP<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
0.31 2. 0.36 3. 0.63 4. 0.72 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 1)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">25<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">50(<span lang="TH">มช</span> 47) <span lang="TH">ตอบข้อ</span> 1.<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">วิธีทำ </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ก่อนอื่นต้องหา หาสัดส่วนของ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมลที่ใช้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">โมลที่มี</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สัดส่วน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Ca = 1<span lang="TH">ที่มี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">n<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(g/m)
= 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(0.65/40)
= 0.01625<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">สัดส่วน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl = 2<span lang="TH">ที่มี</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">n<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">=
2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(cv/1000)
= 2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3.5(8)/1000
= 0.014<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะเห็นว่าสัดส่วน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
HCl <span lang="TH">มีน้อยกว่า แสดงว่า</span> HCl <span lang="TH">จะถูกใช้จนหมด</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">การคำนวณหา</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
H2(g) <span lang="TH">ต่อไปจึงต้องคิดจาก</span> HCl<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากสมการที่ดุลแล้ว</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Ca(s) + 2 HCl(aq) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">CaCl2(aq)
+ H2(g)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จะได้
โมล</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> HCl = 2 <span lang="TH">โมล</span> H2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">10cv00
= 2 2<span lang="TH">ก</span>2<span lang="TH">๊า</span>.4<span lang="TH">ซ</span> V<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1000<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">3.5(8)
</span></b><b><span style="font-family: AngsanaNew; font-size: 14.0pt; mso-hansi-font-family: AngsanaNew;">= </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2 V2<span lang="TH">ก</span>2<span lang="TH">๊า</span>.4<span lang="TH">ซ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">V<span lang="TH">ก๊าซ</span> = 0.3136 <span lang="TH">ลิตร</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นั่นคือ
จะเกิดก๊าซไฮโดรเจน</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 0.31 <span lang="TH">ลิตร โดยประมาณ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Arial Unicode MS","sans-serif"; font-size: 6.0pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin;">⌫⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌫⌦⌦</span></b><b><span style="font-family: Wingdings-Regular; font-size: 6.0pt; mso-ascii-font-family: Wingdings-Regular; mso-hansi-font-family: AngsanaNew;"><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">51(<span lang="TH">มช</span> 49) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">จากปฏิกิริยา </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2
AgNO3(aq) + BaCl2(aq) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2
AgCl(s) + Ba(NO3)2(aq)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้าใช้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
AgNO3 5.10 <span lang="TH">กรัม ทำปฏิกิริยากับ</span> BaCl2 2.08 <span lang="TH">กรัม
จะได้</span> AgCl <span lang="TH">กี่กรัม</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">1.
1.44 2. 2.87 3. 3.58 4. 4.30 </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(<span lang="TH">ข้อ</span> 2)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">52(<span lang="TH">มช</span> 50) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้านำสารละลาย</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Na2CO3 <span lang="TH">เข้มข้น</span> 1.00 mol/dm3 <span lang="TH">ปริมาตร</span>
250.00 cm3 <span lang="TH">ซึ่งหนัก</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">276.50
<span lang="TH">กรัม มาผสมกับสารละลาย</span> HCl <span lang="TH">เข้มข้น</span>
2.00 mol/dm3 <span lang="TH">ปริมาตร</span> 200.00 cm3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ซึ่งหนัก</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
214.60 <span lang="TH">กรัม จะเกิดปฏิกิริยาดังสมการ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Na2CO3(aq)
+ HCl(aq) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">NaCl(aq)
+ H2O(l) + CO2(g) (<span lang="TH">ยังไม่ดุล</span>)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">หลังจากทิ้งไว้จนฟองแก๊สหมด
สารละลายผสมที่ได้มีมวลเป็นเท่าไร </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(481.7)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">53(<span lang="TH">มช</span> 50) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ในการทดลองเตรียมแก๊ส</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
NO <span lang="TH">จากปฏิกิริยาระหว่างแก๊ส</span> NH3 <span lang="TH">กับ แก๊ส</span>
O2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ดังสมการ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
4 NH3(g) + 5O2(g) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">6
H2O(g) + 4 NO(g) <span lang="TH">ถ้าผสมแก๊ส</span> NH3<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ปริมาตร</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
5.00 <span lang="TH">ลิตรที่</span> STP <span lang="TH">และแก๊ส</span> O2 5.00 <span lang="TH">ลิตร ที่</span> STP <span lang="TH">เข้าด้วยกัน พบว่าเมื่อ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ปฏิกิริยาสิ้นสุด
ได้แก๊ส</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> NO <span lang="TH">คิดเป็นน้ำหนัก</span> 4.50 <span lang="TH">กรัม จงหาผลได้ร้อยละ </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">(83.96)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 12.0pt; mso-hansi-font-family: AngsanaNew;">Chem
Online </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">pec9.com
</span></b><b><span lang="TH" style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">ตะลยุ โจทย์โควตา มช</span></b><b><span style="font-family: JasmineUPCBold; font-size: 12.0pt; mso-hansi-font-family: JasmineUPCBold;">.
<span lang="TH">บทที่</span> 4 <span lang="TH">ปริมาณสัมพันธ์ ชดุ</span> 1<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt;">26<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;">ตอนที่</span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 18.0pt;"> 8 <span lang="TH">ปริมาณสารสัมพันธ์ของแก๊ส</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">54(<span lang="TH">มช</span> 44) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Y <span lang="TH">จำนวน</span> 4 <span lang="TH">โมล ทำปฏิกิริยากับ</span> O2 (g)
67.2 <span lang="TH">ที่</span> STP <span lang="TH">เกิดเป็นสารประกอบ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">Z
2 <span lang="TH">โมล เพียงอย่างเดียวหนัก</span> 272 <span lang="TH">กรัม ธาตุ</span>
Y <span lang="TH">มีมวลอะตอมเท่าใด </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 44 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">55(<span lang="TH">มช</span> 46) </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ธาตุ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
A <span lang="TH">จำนวน</span> 5 <span lang="TH">โมล ทำปฏิกิริยาพอดีกับก๊าซออกซิเจน</span>
89.6 <span lang="TH">ลิตร ที่</span> STP<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">เกิดเป็นสารประกอบ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
X <span lang="TH">ชนิดเดียว</span> 3 <span lang="TH">โมล หนัก</span> 338.0 <span lang="TH">กรัม ธาตุ</span> A <span lang="TH">มีมวลอะตอมกี่กรัม </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 42)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">56. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">กำหนดปฏิกริยา</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> 4 X2(g) + 7 Y2(g) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2 X4Y7 (g)<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ถ้าใช้</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">
Y2 28 <span lang="TH">ลูกบาศก์เซนติเมตร ทำปฏิกิริยากับ</span> X2 <span lang="TH">ปริมาณมากเกินพอที่อุณหภูมิ
และ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">ความดันเดียวกัน
จะเกิดแก๊ส</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> X4Y7 <span lang="TH">กี่ลูกบาศก์ เซนติเมตร </span></span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt;">( 8 )<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 16.0pt;">57. </span></b><b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">นำ</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;"> H2 <span lang="TH">และ</span> O2 <span lang="TH">อย่างละ</span> 4 dm3 <span lang="TH">มาทำปฏิกิริยากันที่อุณหภูมิ</span>
100oC <span lang="TH">ดังสมการ</span><o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2H2<o:p></o:p></span></b></div>
<div class="MsoNormal" style="margin-bottom: 0.0001pt;">
<b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">(g)
+ O2 (g) </span></b><b><span style="font-family: SymbolMT; font-size: 16.0pt; mso-bidi-font-family: SymbolMT; mso-hansi-font-family: AngsanaNew;">→ </span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; mso-hansi-font-family: AngsanaNew;">2H2O(g)<o:p></o:p></span></b></div>
<div class="MsoNormal">
<b><span lang="TH" style="font-family: AngsanaNew; font-size: 16.0pt; line-height: 115%; mso-hansi-font-family: AngsanaNew;">เมื่อปฏิกิริยาเกิดอย่างสมบูรณ์
จะมีแก๊สในระบบเท่าใด </span></b><b><span style="font-family: "AngsanaNew-Bold","serif"; font-size: 14.0pt; line-height: 115%;">(6 dm3)</span></b><b><span style="font-family: AngsanaNew; font-size: 16.0pt; line-height: 115%; mso-hansi-font-family: AngsanaNew;">__</span></b><span lang="TH" style="font-family: "Cordia New","sans-serif"; font-size: 14.0pt; line-height: 115%; mso-ansi-font-size: 11.0pt; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Cordia New"; mso-bidi-theme-font: minor-bidi; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><o:p></o:p></span></div>Sunnyhttp://www.blogger.com/profile/13675268776507579585noreply@blogger.com0