Find purity using percentage composition and yield

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Chem_Mod
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Find purity using percentage composition and yield

Postby Chem_Mod » Fri Sep 09, 2011 11:41 pm

Question: How do you find the purity of a compound C10 H7 OH which has been contaminated by LiBr if actual yield in percentages of carbon and hydrogen, which were 74.48 % and 5.20 % respectively are given?

Chem_Mod
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Re: Find purity using percentage composition and yield

Postby Chem_Mod » Fri Sep 09, 2011 11:41 pm

Answer: First, it would be easy to assume 100 grams of sample, meaning that there is 74.48 grams C and 5.20 grams H. Next, using the molar masses of the compounds and elements, calculate the theoretical yield and find the percent yield, which should be around 93 g, and you can conclude quickly that this would correspond to a 93% purity.

Laila Sathe 1D
Posts: 27
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Re: Find purity using percentage composition and yield

Postby Laila Sathe 1D » Thu Oct 01, 2015 3:23 pm

How do you calculate the theoretical and percent yield in this problem?


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