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<div class="moz-cite-prefix">On 07/25/13 01:27, wrote:<br>
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<p>Dr. Pounds, </p>
<p>I was reading Burdge chapter 19 and had a problem with the
sample problems.</p>
<p>In sample problem 19.4 and 19.6, I thought the cathode would
be the Au and Co respectively but in the book these were
described to be anodes.</p>
<p>I thought cathodes had a greater or more positive reduction
potential</p>
<p> </p>
<p>Thank you.</p>
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<br>
<font face="serif">In these sample problems they explicitly gave you
the chemical equation for the reaction that they want you to
consider -- they did not say "write it so it is spontaneous" like
we did in class. In fact, the way they wrote the reactions is
not spontaneous (<img style="vertical-align: middle"
src="cid:part1.07010007.04080007@mercer.edu" alt="$\Delta G$">
is positive).</font><br>
<br>
Because Gold is being oxidized in the reaction they gave you, it is
the anode in this case.<br>
<br>
<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
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