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Why does Cr2+ acts as reducing agent??? Won't it gain electron to acquire d5 stability just as in the case Mn3+?????? This and the below mentioned question are utterly confusing me...Plz clarify .....with suitable explanations....

Why does Cr2+ acts as reducing agent??? Won't it gain electron to acquire d5 stability just as in the case Mn3+??????
This and the below mentioned question are utterly confusing me...Plz clarify .....with suitable explanations....

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago

Dear student

As above answer is not so visible due to text colour, I am posting the same in black text colour

Cr2+ is a reducing agent

while Mn3+ is an oxidizing agent

in spite of both having d4 configuration.

When Cr2+ gets oxidized to Cr3+ (d3),

it attains a stable half-filled t2g orbitals

but when Mn3+ gets reduced to Mn2+ (d5),

it attains a stable half-filled d orbitals.

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