2.5 Faraday of electricity is passed through a solution of CuSO4. The ...
Answer:
Introduction:
In this question, we are given that 2.5 Faraday of electricity is passed through a solution of CuSO4, and we have to find the number of gram equivalents of copper deposited on the cathode.
Solution:
The chemical formula of copper sulfate is CuSO4. When it is dissolved in water, it dissociates into Cu2+ and SO42- ions.
CuSO4 + H2O → Cu2+ + SO42-
During electrolysis, Cu2+ ions get reduced and deposited on the cathode.
Cu2+ + 2e- → Cu
Each copper ion requires two electrons to get reduced to copper. Therefore, the number of gram equivalents of copper deposited on the cathode can be calculated using the following formula:
Gram equivalents of copper = (Number of Faradays of electricity × Atomic weight of copper) ÷ Valency of copper
The atomic weight of copper is 63.5, and its valency is 2.
Substituting the given values in the formula, we get:
Gram equivalents of copper = (2.5 × 63.5) ÷ 2 = 79.375
Therefore, the number of gram equivalents of copper deposited on the cathode will be 79.375.
Conclusion:
In conclusion, when 2.5 Faraday of electricity is passed through a solution of CuSO4, the number of gram equivalents of copper deposited on the cathode will be 79.375.