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Give Reasons: E° Value for the Mn3+/Mn2+ Couple is Much More Positive than that for Fe3+/Fe2+. - CBSE (Science) Class 12 - Chemistry

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Question

Give reasons: E° value for the Mn3+/Mn2+ couple is much more positive than that for Fe3+/Fe2+.

Solution

`E_(Mn^(3+)"/"Mn^(2+))^@` = more positive

`E_(Fe^(3+)"/"Fe^(2+))^@` = less positive

`Mn^(2+) = d^5s^@`

`Mn^(3+) = d^4`

]

Because Mn2+ is more stable than Mn3+. Hence, Mn3+ will have tendency to go in +2 state.
Whereas in case of Fe, Fe3+ is more stable than Fe2+ hence, it have less positive value.

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Solution Give Reasons: E° Value for the Mn3+/Mn2+ Couple is Much More Positive than that for Fe3+/Fe2+. Concept: General Properties of the Transition Elements (D-block).
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