CBSE Class 11-science Answered
Can a solution of 1 M CuSO4 be stored in a vessel made of Nickel metal? Given that E0 Ni, Ni2+ = 0.25 V, E0 Cu, Cu2+ = - 0.34 V
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
In this problem, we want to see whether following reaction can take place or not
Ni + CuSO4 NiSO4 + Cu
i.e. Ni + Cu2+ Ni2+ + Cu
By convention, the cell may be represented as Ni│Ni2+ ║Cu2+│Cu
We are given the oxidation potentials as
E0Ni,Ni2+ = + 0.25 V and E0Cu,Cu2+ = - 0.34 V
Hence, the reduction potential will be
E0Ni2+│Ni = - 0.25 V and E0Cu2+│Cu = + 0.34 V
E0cell = E0Cu2+│Cu – E0Ni2+│Ni
= +0.34 – (-0.25)
= +0.59 V
This EMF comes out to be positive which means CuSO4 reacts with nickel. Therefore, CuSO4 solution cannot be stored in a Nickel vessel.
Answered by | 04 Jun, 2014, 03:23: PM
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