Question detail
If 10 g of reactant A produces a theoretical yield of 25 g of product B, what is the percentage yield if only 15 g of product B is obtained?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Yield and atom economy of chemical reactions (chemistry only)
Question
If 10 g of reactant A produces a theoretical yield of 25 g of product B, what is the percentage yield if only 15 g of product B is obtained?
Answer
The answer is 60 %.
Explanation
This uses Percentage Yield because the objective is about (chemistry only) (HT only) Calculate theoretical mass of product from a given mass of reactant and a balanced equation. The reasoning belongs to Percentage yield within Yield and atom economy of chemical reactions (chemistry only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term HT only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3.
Common mistake
Confusing Theoretical and Actual Yield
Students often confuse theoretical yield with actual yield when calculating percentage yield.
Always remember that theoretical yield is the maximum amount of product expected from a reaction, while actual yield is what is actually obtained. Use the correct values in the percentage yield formula. Keep the correction anchored to Percentage yield; check formula, substitution, calculation, final answer, and unit where relevant.
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