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The E(Call)^(@)=1.18V for Zn(s)||Zn^(+2)...

The `E_(Call)^(@)=1.18V` for `Zn(s)||Zn^(+2)(1M)||Cu^(+2)(1M)|Cu(s)`. The value of `x` if when excess granulated zinc is added to `1M Cu^(+2)` solution the `[Cu^(+2)]_(eq)` becomes `10^(-x)M` is `(T=298 K ,(2.303RT)/(F)=0.059)`

A

40

B

30

C

20

D

10

Text Solution

Verified by Experts

The correct Answer is:
1
`Zn(s)+underset(1M " "1-y~=0=10^(1))(Cu^(+2)(aq))hArr Cu(s)+underset(1)(Zn^(+2)(aq))`
`E_(cell)=E_(cell)^(@)-0.059/2 log.(Zn^(+2))/([Cu^(+2)])`
`0=1.18-(0.059)/(2)log.(1)/(10^(-x))`
`x=40`
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