Given that the standard potentials (E0) of Cu2+/CuandCu+/Cu are 0.34V and 0.522V respectively, the E0 of Cu2+/Cu+ is-
A
+0.158V
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B
−0.158V
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C
−0.182V
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D
0.182V
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Solution
The correct option is A+0.158V ΔG0=−nFE0 Cu2++2e−→Cu.....(3) Cu2++e−→Cu+.....(1) Cu++e−→Cu......(2)
Adding equation (1) and (2), we get (3) ΔG03=ΔG01+ΔG02