Top topic this week
Questions asked by users might not always be phrased in the clearest way.
Iron(III) oxide (Fe2O3) has an oxidation state of +3 for iron. Iron forms three common stable ions: Fe(II) with a +2 oxidation state, Fe(III) with a +3 oxidation state, and Fe(VI) with a +6 oxidation state. Fe2O3 consists of Fe3+ ions and O2- ions. The oxidation state of oxygen in most compounds is -2. Since the compound is neutral, the sum of the oxidation states of the iron and oxygen ions must be zero. Hence, the oxidation state of iron in Fe2O3 is +3.