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The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:

Correct answer: B. 43.6g

  • A. 40g
  • B. 43.6g
  • C. 45g
  • D. 41.4g

Explanation

Percentage yield = actual yield/theoretical yield x 100, so theoretical yield = 24 g x 100/55 = 43.64 g, approximately 43.6 g. The theoretical yield must be greater than the actual yield because a 55% yield means only 55% of the possible product was obtained. Students may choose 40 g by estimating instead of applying the percentage relationship.

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About Theoretical and Percentage Yield

Theoretical yield is the maximum product predicted from a balanced equation and the amount of limiting reactant. Work includes identifying the limiting reagent, comparing theoretical and actual yield, and calculating percentage yield using stoichiometric mole relationships.

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