Gce Model Questions Vol1 2021 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2021 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 20 GCE_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

The reaction \(2\,\text{Al} + 3\,\text{CuSO}_{4}\cdot5\text{H}_{2}\text{O} \rightarrow \text{Al}_{2}(\text{SO}_{4})_{3} + 3\,\text{Cu} + 15\,\text{H}_{2}\text{O}\) occurs in aqueous solution. If 5.00 g of aluminium metal are mixed with 10.0 g of copper(II) sulphate pentahydrate, (a) identify the limiting reagent, (b) calculate the theoretical mass of copper that can be produced, and (c) if the actual mass of copper obtained is 2.10 g, determine the percent yield of the reaction.

Answer Options

A. Limiting reagent: Al; theoretical Cu = 5.12 g; percent yield = 41.0 %
Correct Answer B. Limiting reagent: CuSO_{4}·5H_{2}O; theoretical Cu = 7.64 g; percent yield = 27.5 %
C. Limiting reagent: Al; theoretical Cu = 7.64 g; percent yield = 27.5 %
D. Limiting reagent: CuSO_{4}·5H_{2}O; theoretical Cu = 6.20 g; percent yield = 33.9 %
Correct Answer
B
Correct Option:
Limiting reagent: CuSO_{4}·5H_{2}O; theoretical Cu = 7.64 g; percent yield = 27.5 %

About This Question

This is Gce Model Questions Vol1 2021 Chemistry Question 20. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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