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<div class="moz-cite-prefix">On 11/6/20 9:02 AM, Ray wrote:<br>
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Good Morning <span style="color: rgb(0, 0, 0); font-family:
Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">Dr.
Pounds,</span></div>
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<br>
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I am currently working on the report for the KHP Purity lab, and
I have run into some areas of concern. </div>
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My questions are as follows:</div>
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1) When calculating the moles of NaOH used, would we use the
molarity formula since we have the molarity and the liters of
solution?</div>
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<p>Yes. To compute the moles of NaOH you use the molarity of NaOH
(depends on the carboy you used) multiplied by the volume of NaOH
used.</p>
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cite="mid:0313be1a7fbc4eb995022feaeef21f20@CO2PR01MB1976.prod.exchangelabs.com">
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2) After finding molarity, since KHP and NaOH are in a 1-to-1
ratio for this lab, would this mole amount also be the moles of
pure KHP?</div>
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<p><br>
</p>
<p>Yes. <br>
</p>
<p><br>
</p>
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cite="mid:0313be1a7fbc4eb995022feaeef21f20@CO2PR01MB1976.prod.exchangelabs.com">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
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3) To find the percent KHP, do we use the purity perce<span
style="font-family: Calibri, Helvetica, sans-serif; font-size:
12pt;">ntage formula: </span><span style="box-sizing:
border-box; border-width: 0px; border-style: solid;
border-color: currentcolor; color: rgb(43, 43, 43);
font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;
text-align: center;">percentage puri</span><span
style="box-sizing: border-box; border-width: 0px;
border-style: solid; border-color: currentcolor; color:
rgb(43, 43, 43); font-family: Calibri, Helvetica, sans-serif;
font-size: 12pt; text-align: center; background-color:
rgb(255, 255, 255);">ty</span><span style="box-sizing:
border-box; border-width: 0px; border-style: solid;
border-color: currentcolor; color: rgb(43, 43, 43);
font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;
text-align: center; background-color: rgb(255, 255, 255);"> </span><span
style="color: rgb(43, 43, 43); font-family: Calibri,
Helvetica, sans-serif; font-size: 12pt; text-align: center;
background-color: rgb(255, 255, 255); display: inline
!important;">= (mass of pure substance ÷ mass of impure
sample) × 100%? Is there another way we are supposed to find
the percent of KHP?</span></div>
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<p><br>
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<p>Yes.<br>
</p>
<p><br>
</p>
<blockquote type="cite"
cite="mid:0313be1a7fbc4eb995022feaeef21f20@CO2PR01MB1976.prod.exchangelabs.com">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(43, 43, 43); font-family: Calibri,
Helvetica, sans-serif; font-size: 12pt; text-align: center;
background-color: rgb(255, 255, 255); display: inline
!important;"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(43, 43, 43); font-family: Calibri,
Helvetica, sans-serif; font-size: 12pt; text-align: center;
background-color: rgb(255, 255, 255); display: inline
!important;">Please refer me to the proper location if I have
missed some information about this lab! Thank you, in advance,
for your help!</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(43, 43, 43); font-family: Calibri,
Helvetica, sans-serif; font-size: 12pt; text-align: center;
background-color: rgb(255, 255, 255); display: inline
!important;">Sincerely,</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(43, 43, 43); font-family: Calibri,
Helvetica, sans-serif; font-size: 12pt; text-align: center;
background-color: rgb(255, 255, 255); display: inline
!important;">Whitney Ray</span></div>
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<p><br>
</p>
<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
Director of the Computational Science Program
Mercer University, Macon, GA 31207 (478) 301-5627
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