Question

Fe₃O₄ may be regarded as a mixture of ______ and ______.

Answer 1

Fe₃O₄ may be regarded as a mixture of FeO and Fe₂O₃.

Explanation:

Fe₃O₄ is a mixed oxide of iron. It can be considered as a mixture of ferrous oxide (FeO) and ferric oxide (Fe₂O₃), i.e.:

Fe₃O₄ = FeO.Fe₂O₃

This shows that it contains both Fe²⁺ and Fe³⁺ ions.