Question #6a80e

1 Answer
Jumbotron · Ernest Z.
Aug 15, 2017

The oxidation number of "Mn"Mn is +6.

Explanation:

The name is manganate ion, "MnO"_4^"2-"MnO2-4.

Reason

"Mn = +6"Mn = +6

"O = -2", color(white)(x)"4 × O" = 4 ×("-2") = "-8"O = -2,x4 × O=4×(-2)=-8

"1e"^"-" = "-1"1e-=-1

∴ "MnO"_4^"2-" = "+7 - 8 - 1 = -2"MnO2-4=+7 - 8 - 1 = -2

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