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The equilibrium Cu^(++) (aq) + Cu(s) rig...

The equilibrium `Cu^(++)` (aq) + Cu(s) rightarrow 2Cu^(+)` established at `20^(@)`C corresponds to `[Cu^(++)]/[Cu^(+)]^(2) = 2.02 x x10^(4)`. The standard potential , `E_(Cu^(++)//Cu)^(@) = 0.33` volt. At this temperature, what is the standard potential , `E_(Cu//Cu)^(@)`?

A

`-0.457V`

B

`1.54V`

C

`1.26V`

D

`0.42V

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A
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