[CHM 111] KHP Purity Lab

[Andrew J. Pounds]

On 11/6/20 9:02 AM, Ray wrote:
> Good Morning Dr. Pounds,
>
> I am currently working on the report for the KHP Purity lab, and I
> have run into some areas of concern. 
>
> My questions are as follows:
> 1) When calculating the moles of NaOH used, would we use the molarity
> formula since we have the molarity and the liters of solution?


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.


> 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?


Yes.


> 3) To find the percent KHP, do we use the purity percentage
> formula: percentage purity = (mass of pure substance ÷ mass of impure
> sample) × 100%? Is there another way we are supposed to find the
> percent of KHP?


Yes.


>
> Please refer me to the proper location if I have missed some
> information about this lab! Thank you, in advance, for your help!
> Sincerely,
> Whitney Ray


-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Director of the Computational Science Program
Mercer University,  Macon, GA 31207   (478) 301-5627

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://theochem.mercer.edu/pipermail/chm111/attachments/20201106/52c35cff/attachment.html>