Igcse Model Questions Vol1 2017 Chemistry Question 23

Practice objective / multiple choice question 23 from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 23 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

A galvanic cell is constructed with a zinc electrode immersed in 0.010 M ZnSO₄ solution and a copper electrode immersed in a CuSO₄ solution of unknown concentration. The standard cell potential for the reaction Zn|Zn²⁺ || Cu²⁺|Cu is \(E^\circ = 1.10\) V. At 25 °C the measured cell potential is 0.96 V. (a) Determine the concentration of Cu²⁺ in the copper half‑cell. (b) If 0.500 L of this Cu²⁺ solution is electrolysed for 2.00 h at a constant current of 0.250 A, calculate the mass of copper deposited on the copper electrode.

Answer Options

Correct Answer A. [Cu²⁺] ≈ 1.9×10⁻⁷ M; mass of Cu deposited ≈ 0.59 g
B. [Cu²⁺] ≈ 2.1×10⁻⁷ M; mass of Cu deposited ≈ 0.30 g
C. [Cu²⁺] ≈ 5.0×10⁻⁸ M; mass of Cu deposited ≈ 0.78 g
D. [Cu²⁺] ≈ 3.2×10⁻⁶ M; mass of Cu deposited ≈ 0.45 g
Correct Answer
A
Correct Option:
[Cu²⁺] ≈ 1.9×10⁻⁷ M; mass of Cu deposited ≈ 0.59 g

About This Question

This is Igcse Model Questions Vol1 2017 Chemistry Question 23. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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