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The E(M^(3+)//M^(2+))^(@) values for Cr,...

The `E_(M^(3+)//M^(2+))^(@)` values for `Cr, Mb, Fe` and `Co` are `-0.41, +1.57, +0.77` and `+1.97V` respectively. For which one of these metals the change in oxidation state from `+2` to `+3` is easiest?

A

Cr

B

Mn

C

`Fe`

D

`Co`

Text Solution

Verified by Experts

The correct Answer is:
A
`Cr^(2+)|Cr^(3+)=+0.41V" " Mn^(2+)|Mn^(3+)=-1.57V`
`Fe^(2+)|Fe^(3+)=0.77V" "Co^(2+)|Co^(3+)=-1.97V`
As `Cr` will have maximum oxidation potential value, therefore is oxidation will be easiest.
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