Electrochemistry

Electrochemistry

Question

Two Faraday of electricity is passed through a solution of CuSO4. The mass of copper deposited at the cathode is: (at. mass of Cu = 63.5 amu)

  • 0 g

  • 63.5 g

  • 2 g

  • 127 g

Answer

B.

63.5 g

Atomic mass of Cu = 63.5 u
Valency of the metal Z= 2
We have,
CuSO4 → Cu2+ + SO42-
Cu2+ + 2e-  →  Cu

1 mol   2 mol       1 mol = 63.5 g

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