What is the oxidation number of O in Fe2O3?

Answer 1

- Oxygen in almost all compounds has an oxidation # of (-2).

- Your solving for the oxidation # of Fe so make this (X)

- Creating an equation with what you know:

There are 2 Fe in the compound, so it would be 2X.

There are 3 O in the compound, so it would be (-2 * 3) = -6

2X - 6 = 0

-Do the algebra:

1) 2X = +6

2) X = +6/ 2

3) X = Fe = +3 oxidation number

Answer 2

-2.

The oxidation number of oxygen is almost always -2, unless it is in a superoxide, peroxide, bonded to fluorine, or with itself.

In Fe2O3, we know that the total negative charge must equal the total positive charge.

O3 = -6

Fe = +3 x 2 = +6

Answer 3

It is an increase of 1 as iron goes from the 2+ to the 3+ oxidation state.

Answer 4

+3 for each Fe, -2 for each O.

Note: There is no compound with the formula FeO3 as originally asked in the question.

Answer 5

FeO, iron is +2; Fe2O3 iron is +3. Oxygen is -2 in both compounds

Answer 6

oxidation state is +2

Answer 7

Iron is in oxidation state +3 in Fe2O3

Answer 8

3+