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25 February, 07:49

What is the oxidation number assigned to magnesium in KMnO4?

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  1. 25 February, 09:26
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    Oxygen is mostly negative besides linking with F (fluor).

    Oxygen is mostly in - 2 oxidation states besides peroxide, superoxides.

    Alkaline and alkaline-earth metals are respectively in + 1 and + 2 ox. states.

    Normal molecule must be in 0 ox. state

    K Mn O4 - oxidation state of Mn is "x". So,

    (+1) + (x) + (2 * (-4)) = 0

    x = 7
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