# Problem: Indicate the oxidation number of oxygen for each compound in the following reaction:2 H2O2(aq) → 2 H2O(l) + O2(g)Select the choice that gives the oxidation numbers of oxygen in each of H2O2, H2O(l), and O2(g), respectively.A.  −1,  −2, 0B. −1, 0, −2C. 0, −2, −1D. −2, −1, 0Hydrogen has three possible oxidation numbers:• − 1 when bonded to a metal,• 0 when in elemental form, H2, and• +1 when bonded to a nonmetal.Oxygen has several possible oxidation numbers:• −2 when bonded to a nonmetal (other than fluorine) or as the oxide ion, O2−,• −1 as the peroxide ion, O22−,• −1/2 as the superoxide ion, O2−, and• 0 when in elemental form, O2 or O3.

###### Problem Details

Indicate the oxidation number of oxygen for each compound in the following reaction:

2 H2O2(aq) → 2 H2O(l) + O2(g)

Select the choice that gives the oxidation numbers of oxygen in each of H2O2, H2O(l), and O2(g), respectively.

A.  −1,  −2, 0

B. −1, 0, −2

C. 0, −2, −1

D. −2, −1, 0

Hydrogen has three possible oxidation numbers:

• − 1 when bonded to a metal,
• 0 when in elemental form, H2, and
• +1 when bonded to a nonmetal.

Oxygen has several possible oxidation numbers:

• −2 when bonded to a nonmetal (other than fluorine) or as the oxide ion, O2−,
• −1 as the peroxide ion, O22−,
• −1/2 as the superoxide ion, O2, and
• 0 when in elemental form, O2 or O3.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Calculate Oxidation Number concept. If you need more Calculate Oxidation Number practice, you can also practice Calculate Oxidation Number practice problems.