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Question

Find the oxidation number of Mn in $$MnO^-_4$$.


Solution

Let X be the oxidation number of Mn in $$MnO^-_4$$..
The O atoms have oxidation number of -2.
$$ \displaystyle    X+4(-2)=-1$$
$$ \displaystyle    X-8=-1$$
$$ \displaystyle X=+7$$
The oxidation number of  Mn in $$MnO^-_4$$. is $$+7$$.

Chemistry

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