What Is the Oxidation Number of Oxygen in H2O2?


Quick Answer

The oxidation number of oxygen in H2O2 is -1. The state of oxidization directly corresponds to the change in the number of electrons when one atom joins other atoms in a compound.

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Full Answer

H2O2, or hydrogen peroxide, can act as an oxidizing agent as well as be oxidized. This means that the peroxide is able to gather two more electrons and for a hydrogen ion. This would further change the oxidization number of the oxygen in the ion to -2. Peroxide can also act as a reducing agent, which means that the molecule loses two electrons and becomes an O2 molecule. The oxidation number of the oxygen then becomes zero.

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