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

The `E_(M^(3+)//M^(2+))^(@)` values for Cr, Mn 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 form +2 to +3 is easiest ?

A

Cr

B

Co

C

Fe

D

Mn

Text Solution

Verified by Experts

`Cr^(2+)|C r^(3+)+0.41V`
`M n^(2+)|M n^(3+)=1.57Vimplies Fe^(3+)=-0.77Vimplies Co^(2+)|Co^(3+)=-1.97V`
More is the value of axidation potential more is the tendency to get oxidised.As Cr will have maximum oxidation potential value,therefore its oxidation willl be easiest.
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