Q.
Two Faraday of electricity is passed through a solution of CuSO4. The mass of copper deposited at the cathode is (atomic mass of Cu = 63.5 u)
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a
0 g
b
63.5 g
c
2 g
d
127 g
answer is B.
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Detailed Solution
Given, Q - 2F, Atomic mass of Cu - 63.5 uValency of the metal Z = 2We have, CuSO4⟶Cu2++SO42 Cu2+1mol+2e−2mol⟶Cu1mol=63.5gAlternatively, w=zQ=EF⋅2F=2E=2×63.52=63.5g
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