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Cell equation : A+2B^(+)rarr A^(2+)+2B, ...

Cell equation : `A+2B^(+)rarr A^(2+)+2B, A^(2+)+2e rarr A, E^(@)=+0.34V and log_(10)K=15.6" at 300 K"` for cell reactions. Find `E^(@)` for `B^(+)+e rarr B`-
`["Given: "(2.303RT)/(nF)="0.059 at 300K"]`

A

0.80V

B

1.26V

C

`-0.54V`

D

`+0.94V`

Text Solution

Verified by Experts

The correct Answer is:
A
`E_("cell")^(@)=(0.059)/(2)logK`
`E_(B^(+)|B)^(0)-E_(A^(2+)|A)=(0.059)/(2)logK`
`E_(B^(+)|B)^(0)-0.3V=(0.059)/(2)xx15.6`
`E_(B^(+)|B)^(0)=0.46+0.34=0.80 V`
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