Calculating Percent Yield for a Chemical Reaction

[Numnum]

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!

 

[Borek]

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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