Neco 2023 Chemistry Question 14

Practice objective / multiple choice question 14 from the 2023 Neco Chemistry examination.

Neco 2023 Chemistry Objective / Multiple Choice Medium Difficulty
Question 14 NECO • 2023 • CHEMISTRY • objective

A copper plating operation requires depositing \(5.00\ \text{g}\) of Cu from a \(\mathrm{Cu^{2+}}\) solution. The current efficiency of the process is 85 %. (a) Calculate the total charge that must be passed through the cell. (b) If a constant current of \(2.00\ \text{A}\) is used, how long will the plating take? (Atomic mass of Cu = 63.55 g mol⁻¹, \(F = 96485\ \text{C mol}^{-1}\)).

Answer Options

A. Total charge ≈ 1.90×10⁴ C; time ≈ 2.6 h (≈2 h 36 min).
B. Total charge ≈ 2.05×10⁴ C; time ≈ 2.8 h (≈2 h 48 min).
C. Total charge ≈ 1.60×10⁴ C; time ≈ 2.2 h (≈2 h 12 min).
Correct Answer D. Total charge ≈ 1.79×10⁴ C; time ≈ 2.5 h (≈2 h 29 min).
Correct Answer
D
Correct Option:
Total charge ≈ 1.79×10⁴ C; time ≈ 2.5 h (≈2 h 29 min).

About This Question

This is Neco 2023 Chemistry Question 14. It is one of the objective questions from the 2023 Neco Chemistry examination.

Difficulty level: Medium .

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