Use standard reduction potentials to calculate the equilibrium constant for the reaction:
Cu²⁺ (aq) + Ni(s) → Cu(s) + Ni²⁺ (aq)
Hint: Carry at least 5 significant figures during intermediate calculations to avoid round off error when taking the antilogarithm.

Value of equilibrium constant is

Explanation:

Oxidation: ;

Reduction: ;

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Overall:

We know,

where, k is equilibrium constant, n is no. of electron exchanged, 1F = 96500 C/mol, R is gas constant and T = 298 K

So,