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Nov 19, 2020· FeO and Fe2O3 are oxides of iron having different oxidation states of iron atoms. The key difference between FeO and Fe2O3 is that FeO has iron in +2 oxidations state, whereas Fe2O3 has iron in +3 oxidation state. Moreover, FeO is a black powder while Fe2O3 is a red powder. The following infographic tabulates more differences between FeO and Fe2O3.





















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