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The standard emf for the cell reaction, ...

The standard emf for the cell reaction,
`2Cu^(+)(aq)to2Cu(s)+Cu^(2+)(aq)`
is `0.36V` at `298K`. The equilibrium constant of the reaction is

A

`5xx10^(6)`

B

`1.4xx10^(12)`

C

`7.4xx10^(12)`

D

`1.2xx10^(6)`

Text Solution

Verified by Experts

The correct Answer is:
D
`E=E^(@)-0.059/n log[("products")/("reactants")]`
`E^(@)=0` at equllibrium
`0=E^(@)-0.059/nlogK_(eq)`
or `logK_(eq)=(nE^(@))/0.059`
ro `logK_(eq)=(1xx0.36)/0.059=6.09`
`K_(eq)=1.2xx10^(6)`
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