Question

A reaction is known to have a percent yield of $80$%. It the actual yield is $25$ grams, what was the expected yield?

• A. $3.2grams$
• B. $19grams$
• C. $31.25grams$
• D. $190grams$

Answer 1

Answer: (C)

$31.25grams$

Percent yield is the ratio of actual yield to the expected yield of compound.

$\%$ Yield $=\frac{\text{Actual Yield}}{\text{Expected Yield}}\times 100$

$\Rightarrow 80=\frac{25}{\text{Expected Yield}}\times 100$

$\Rightarrow$ Expected Yield $=\frac{25}{80}\times 100=\frac{250}{8}=31.259g$