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<div class="moz-cite-prefix">On 6/8/21 5:43 PM, wrote:<br>
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<div>Good evening Dr. Pounds, </div>
<div dir="ltr">I’m having a hard time finding the pure KHP. I
first started using the mass of the impure KHP and divided
it by the molar mass of KHP given to us from the last lab
then I realized the amount we weighed out is the impure and
I can’t find in the notes how to find pure KHP. Do you know
where I could find an equation or could you tell me the
equation to find pure KHP? Thank you<span></span></div>
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<p>To find the moles of KHP you simply have to find the moles of
NaOH -- remember, KHP is an acid that reacts with NaOH on a 1:1
basis. So, in today's experiment you determined the moles of KHP
in your unknown by reacting the unknown with NaOH. It is assumed
that the other "stuff" in the unknown was non-reactive.</p>
<p>moles KHP = (volume of NaOH) (Molarith of NaOH)<br>
</p>
<p>Once you know the moles of KHP multiply it by the molar mass of
KHP to get the mass of KHP in your unknown sample. Divide that
number by the total mass of the unknown sample and multiply by 100
to find the %KHP in your sample.</p>
<p>Let me know if you have other questions.<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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