Answered: Yan, a chemist, is performing a…

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter4: Stoichiometry Of Chemical Reactions

Section: Chapter Questions

Problem 63E: A student isolated 25 g of a compound following a procedure that would theoretically yield 81 g....

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Question

Yan, a chemist, is performing a synthesis of tartaric acid. She expected to produce 1.662 g but recovered only 1.008 g. What is the percent yield?

Expert Solution

Step 1: Percent Yield

The percent yield of a reaction is expressed as:

$P e r c e n t y i e l d = \frac{A c t u a l y i e l d}{T h e o r e t i c a l y i e l d} \times 100 %$

Step 2: Calculation

As it is expected to produce 1.662 g of tartaric acid therefore the theoretical yield of tartaric acid is 1.662 g.
As 1.008 g of tartaric acid is only recovered therefore the actual yield of tartaric acid is 1.008 g.

Hence, the percent yield is calculated as shown below:

$P e r c e n t y i e l d = \frac{1.008 g}{1.662 g} \times 100 % = 60.65 %$

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