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The standard reduction potentials of Cu^...

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

A

`0.184V`

B

`0.827V`

C

`0.521V`

D

`0.490V`

Text Solution

Verified by Experts

The correct Answer is:
c
`Cu^(2+)+2e^(-) rarr Cu ….(1) E_(1)^(@)`
`Cu^(2+)+e^(-) rarr Cu^(+) ....(2) E_(2)^(@)`
Net equation `(Cu^(+)+e^(-) rarr Cu)....(3)`
`E_(3)^(@)` is obtained by `Eq. (1)-(2)`
`E_(3)^(@)=(n_(1)E_(1)^(@)-n_(2)E_(2)^(@))/(n_(3))=(2xx0.337-1xx0.153)/(1)=0.521V`
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