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What is the standard reducing potential ...

What is the standard reducing potential `(E^(@))` for `Fe^(3+)to Fe`?
(Given that `Fe^(2+)+2e^(-)rightarrowFe,` `E_(Fe^(2+)//Fe^(@)) =-0.47V`
`Fe^(3+) + e^(-)to Fe^(2+)`, `E_(Fe^(3+)//Fe^(2+))^(@)= +0.77V`

A

`-0.057 V `

B

`+0.057 V `

C

`+0.30 V `

D

`- 0.30 V`

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta G^(@) = - n FE^(@)`

`DeltaG^(0) = - nFE^(0)`
`E^(0)` for `(Fe^(3+) to Fe) = (Delta G^(0))/(-nF) = (0.17 F)/(-3F) = -0.057 V`
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