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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">One of your fellow students pointed out a mistake in Table 16.3 and in the solutions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">manual for 16.66. They are related.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Problem 16.66 deals with calculating the pH for a solution of tartaric acid. This is a<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">diprotic acid. We haven’t covered this in class yet (will do on Monday). Table 16.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">has several polyprotic acids and their Ka values.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">The formula for tartaric acid is incorrect. It’s missing two H atoms. It should be<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">C2H4O2(CO2H)2 or H2C4H4O6 (with the 2 acidic H atoms written to the far left).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">In the solutions manual it gives the pH as 1.18. It should be 1.81.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Thanks again to one of your classmates for catching these errors.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Dr. Zellmer<o:p></o:p></span></p>
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