WAEC Chemistry 2023 Objective — Question 5
Question 5 of 50 from the West African Examinations Council (WAEC) Chemistry 2023 Objective paper, with the correct answer and a full explanation.
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How many moles of copper would be deposited by passing 1 Faraday of electricity through a CuCl2 solution?
- A. 2
- B. 1
- C. 0.5Correct
- D. 0.25
Explanation
Cu2+ + 2e− → Cu. Since 2 moles of electrons (2F) are required to deposit 1 mole of copper, the amount deposited using 1F = (1 mol/2F) × 1F = 0.5 mol.
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