Calculating Percent Yield for a Chemical Reaction

AI Thread Summary
The discussion centers on calculating the theoretical yield of sodium chloride from a reaction involving sodium bromide and potassium chloride. The theoretical yield was calculated to be approximately 14.201 grams of NaCl based on the stoichiometry of the reaction. The actual yield obtained was 18 grams, leading to a percent yield calculation of 78.9%. Participants noted the importance of significant figures in reporting results. The conversation also touched on the definition of percent yield in chemical reactions.
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Homework Statement



1. If we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be?

2. If our actual yield from this reaction was 18 grams of sodium chloride, what would our percent yield for this reaction be?


The Attempt at a Solution



1. NaBr + KCl ------> NaCl + KBr

MNaBr = 25gNaBr ÷ 102.9gNaBr = 0.243molNaBr
0.243molNaBr x 1molNaCl/1molNaBr = 0.243molNaCl
0.243molNaCl x 58.44gNaCl/1molNaCl
= 14.201g NaCl

2. 14.201/18 x 100 = 78.9%


Is this correct? Thank you!
 
Physics news on Phys.org
In general too many significant figures, but other than that NaCl mass is OK.

What is definition of the percent yield?

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