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Question

What are the oxidation numbers in the compound H2O2?


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Solution

Oxidation number:

  • “Oxidation number denotes the oxidation state of an element in a compound ascertained according to a set of rules formulated on the basis that electron pair in a covalent bond belongs entirely to a more electronegative element.”

Oxidation numbers in H2O2:

  • Hydrogen peroxide carries no charge, it is a neutral compound.
  • Hydrogen exists in +1 oxidation number. Thus, two hydrogens will have a total of +2 oxidation number.
  • In the case of Oxygen, the oxidation number of Oxygen in peroxide is -1. Thus two oxygen atoms will have a total of -2 oxidation number.

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