7
AssignmentMultiple Choice

Limiting Reactant and Percent Yield

Question 7 • LA-Chemistry A

Which option below has the correct order of steps to complete a stoichiometric calculation to determine percent yield?

Answer
A
Write a balanced equation, determine the limiting reactant, calculate the theoretical yield, calculate the percent yield
B
Write a balanced equation, determine the excess reactant, calculate the theoretical yield, calculate the percent yield
C
Determine the excess reactant, write a balanced equation, calculate the theoretical yield, calculate the percent yield
D
Calculate the percent yield, determine the limiting reactant, write a balanced equation, calculate the theoretical yield

Explanation

First write and balance the chemical equation so the mole ratios are known. Use the reactant amounts and those ratios to identify the limiting reactant, then calculate the theoretical yield from it. Finally, compare the actual yield with the theoretical yield using percent yield = (actual yield ÷ theoretical yield) × 100%; this is the sequence in choice A.

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