<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">On 07/17/14 02:41, wrote:<br>
</div>
<blockquote
cite="mid:C40B2F181831EF44A88CD73525827803130774D891@MERCERMAIL.MercerU.local"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<style type="text/css" style="display:none"><!-- p { margin-top: 0px; margin-bottom: 0px; }--></style>
<div id="OWAFontStyleDivID"
style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p style="">Hello Dr. Pounds,<br>
</p>
<p style=""><br>
</p>
<p style="">I have two questions about a step in finding the
pH in question 3 of Quiz 10. </p>
<p style=""><br>
</p>
<p style="">Firstly, do we add the liters from question 2 (1.5
L) to that of question 3 (.4 L), making the total 1.90 L (1.0
L + .5 L + .4 L)? Or should this be left as 1.4 L (1.0 L +.4L)<br>
</p>
<p style=""><br>
</p>
</div>
</blockquote>
<br>
Yes.<br>
<br>
<blockquote
cite="mid:C40B2F181831EF44A88CD73525827803130774D891@MERCERMAIL.MercerU.local"
type="cite">
<div id="OWAFontStyleDivID"
style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p style="">
</p>
<p style="">Secondly, for #3, do we find the initial
concentration of HC<span style="font-size: 8pt; ">7</span>H<span
style="font-size: 8pt; ">5</span>O<span style="font-size:
8pt; ">2</span> and C<span style="font-size: 8pt; ">7</span>H<span
style="font-size: 8pt; ">5</span>O<span style="font-size:
8pt; ">2</span> by following the method in slide 12 of your
notes (subtracting the moles of HC<span style="font-size: 8pt;
">7</span>H<span style="font-size: 8pt; ">5</span>O<span
style="font-size: 8pt; ">2 <span style="font-size: 12pt; ">from
the moles of NaOH and dividing by the total L) or like in
slide 15, in which an extra step is added.</span></span><br>
</p>
<p style=""><span style="font-size: 8pt; "><span
style="font-size: 12pt; "><br>
</span></span></p>
</div>
</blockquote>
<br>
Yes, but in this particular case the amount of weak acid is
decreasing and the amount of conjugate base is increasing.<br>
<br>
<blockquote
cite="mid:C40B2F181831EF44A88CD73525827803130774D891@MERCERMAIL.MercerU.local"
type="cite">
<div id="OWAFontStyleDivID"
style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p style=""><span style="font-size: 8pt; "><span
style="font-size: 12pt; ">
</span></span></p>
<p style=""><span style="font-size: 8pt; "><span
style="font-size: 12pt; ">Thank you for your help!</span></span></p>
<p style=""><span style="font-size: 8pt; "><span
style="font-size: 12pt; "><br>
</span></span></p>
<p style=""><span style="font-size: 8pt; "><span
style="font-size: 12pt; ">Christine Okaro</span></span></p>
</div>
</blockquote>
<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>
</pre>
</body>
</html>