[CHM 111] Lab 4 report

[Andrew J. Pounds]

On 09/27/2015 09:37 PM, wrote:
> Hi Dr. Pounds,
> I am having trouble trying to figure out how to calculate the mass of 
> impure KHP. How exactly am I supposed to find this value?
>
> Thanks,
> -- 
>

Remmeber, in this reaction the sodium hydroxide reacts with the KHP on a 
1:1 basis.  With that said, compute the moles of NaOH by multiplying the 
molarity you determined two weeks ago by the volume of NaOH you used in 
liters.   This is equal to the number of moles of KHP.  Multiply the 
moles of KHP by the molar mass of KHP to get the mass of pure KHP.

Dividing the mass of pure KHP by the mass of the sample should then give 
the %KHP in the sample.

-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

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