Waec Model Questions Vol1 2020 Chemistry Question 44

Practice objective / multiple choice question 44 from the 2020 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 44 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

In the reaction 2 Al + 3 CuSO₄ → Al₂(SO₄)₃ + 3 Cu, 5.0 g of aluminium metal are mixed with 10.0 g of copper(II) sulfate. (i) Identify the limiting reagent. (ii) Calculate the theoretical mass of copper that can be produced. (iii) If the actual mass of copper obtained is 2.5 g, determine the percent yield.

Answer Options

Correct Answer A. Limiting reagent: CuSO₄; theoretical Cu mass ≈ 4.0 g; percent yield ≈ 62.7 %
B. Limiting reagent: Al; theoretical Cu mass ≈ 3.2 g; percent yield ≈ 78.1 %
C. Limiting reagent: CuSO₄; theoretical Cu mass ≈ 5.0 g; percent yield ≈ 50.0 %
D. Limiting reagent: Al; theoretical Cu mass ≈ 4.0 g; percent yield ≈ 62.7 %
Correct Answer
A
Correct Option:
Limiting reagent: CuSO₄; theoretical Cu mass ≈ 4.0 g; percent yield ≈ 62.7 %

About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 44. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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