0.1 Faraday of electricity was passed through a solution of copper (ll) sulphate. The maximum...

JAMB 1979

0.1 Faraday of electricity was passed through a solution of copper (ll) sulphate. The maximum weight of copper deposited on the cathode would be [Cu = 64]

A. 64.0g
B. 32.0g
C. 16.0g
D. 6.4 g
E. 3.2g

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Correct Answer: Option E

Explanation

CuSO₄ \(\to\) Cu²⁺ + SO₄²⁺

Cu²⁺ + 2e \(\to\) Cu

1 Faraday will deposit \(\frac{64}{2}\)gms of copper

0.1 faraday will deposit \(\frac{64}{2} \times \frac{1}{10} = \frac{64}{20}\)

= \(\frac{32}{10}\) = 3.2gms

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