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The standard reduction potentials of Cu^...

The standard reduction potentials of `Cu^(2+)//Cu` and `Cu^(2+)//Cu^(+)` are 0.337 V and 0.153V respectively. The standard electrode potential of `Cu^(+)//Cu` half-cell is

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Given: (i) `Cu^(2+)+2e^(-)toCu,E^(@)=0.337V," "DeltaG_(1)^(@)=-2xxFxx0.337J`
(ii) `Cu^(2+)+e^(-)toCu^(2+),E^(@)=0.153V," "DeltaG_(2)^(@)=-1xxFxx0.153J`
Aim: `Cu^(+)+e^(-)toCu,DeltaG_(3)^(@)=?`
(i)-(ii) gives the required result, i.e., `DeltaG_(3)^(@)=DeltaG_(1)^(@)-Delta_(2)^(@)=[-674-(0.153)]F=-0.521F`
`therefore-nFE_(Cu^(+)//Cu)^(@)=-0.521F` or `E_(Cu^(+)//Cu)^(@)=0.521V(becausen=1)`.
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