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12 July, 02:08

Oxygen always has an oxidation number of - 2 unless it is combined with fluorine or found in the compound peroxide. When in the compound peroxide, it has an oxidation number of?

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  1. 12 July, 04:35
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    When oxygen is found is peroxide, it has an oxidation number of - 1.

    The chemical formula of hydrogen peroxide is H2O2. We know that hydrogen always has + 1 oxidation state until it forms metal hydrides. So in H2O2, the oxidation state ofhydrogen is + 1.

    Now, let oxidation state of oxygen be x. So,

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

    2 + 2x = 0

    2x = - 2

    x = - 2 / 2

    x = - 1

    Hence, the oxidation number of oxygen in peroxides is - 1
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