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If E(Fe^(3+)//Fe)^(@) and E(Fe^(2+)//Fe)...

If `E_(Fe^(3+)//Fe)^(@)` and `E_(Fe^(2+)//Fe)^(@)` are `-0.36 V` and `0.439 V` respectively, then value of `E_(Fe^(3+)//Fe^(2+))^(@)` is

A

`(-0.036-0.439) V`

B

`[3(-0.36)+2(0.439)] V`

C

`(-0.36-0.439)] V`

D

`[(3-0.36)-2(-0.439)]V`

Text Solution

Verified by Experts

The correct Answer is:
D
`E_(Fe^(3)//Fe^(2+))^(@)=3E_(Fe^(3+)//Fe)^(@)-2E_(Fe^(2+)//Fe)^(@)`
`=[(3-0.36)-2(-0.439)]V`
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