alleryA CuSO₄ solution is electrolysed with 1.5 A for 10 minutes. The mass of copper (M = 63.5) deposited at the cathode is approximately:
A0.15 g
B1.00 g
C0.60 g
D0.30 g
Answer & Solution
Correct answer: D. 0.30 g
Q = It = 1.5 × 600 = 900 C. Cu²⁺ + 2e⁻
→ Cu requires 2F = 193 000 C per mole (63.5 g).
Mass = 63.5 × 900 / (2 × 96 500) = **≈ 0.296 g ≈ 0.30 g**.
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