1.

Given that the standard potential , E^(@) of Cu^(2+)|Cu and Cu^(+)|Cu are 0.340 V and 0.522 V respectively. The E^(@) of Cu^(2+)|Cu^(+) is:

Answer»

0.158 V
`-0.158 V`
`0.182V`
`-0.182V`

Solution :`CU^(2+)+2e^(-) to Cu""E^(@)=0.340V `
`underline(Cu to Cu^(+) +e^(-))""E^(@)=-0.522V`
`Cu^(2+)+e^(-) to Cu^(+)""E^(@)=(?)`
Applying, `DeltaG=nFE^(@)`
`(-1xxFxxE^(@))=(-2xxFxx0.340)`
`=(-2xxFxx0.340)-(-1xxFxx-0.522)`
`=-2xxFxx0.340+1xxFxx0.522`
`-1xxFxxE^(@)=-1Fxx0.158V`
`therefore E^(@)=0.158V`


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