In MnO4-4 What is the oxidation number of Mn?

The oxidation number of Mn IS +7


Let the oxidation number of Mn be x.

We know that, Ox. No. of O = −2.

So, Ox. no. Mn+ 4(Ox. no. O)

=−1 x + 4(−2) = −1

or x − 8= −1

or x = +8−1 = +7

The oxidation number of Mn in [MnO4] ion is +7.

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