Question

The composition of a sample of wustite is Fe_0.93O_1.00. What percentage of the iron is present in the form of Fe (III)?

Answer 1

Fe₃O₄ (wustite) may be regarded as mixture of FeO and Fe₂O₃. 

Suppose the percentage of FeO (by wt.) = x 

.'. Percentage of Fe₂O₃ (by wt.) = 100 - x 

Total amount of Fe in 100g of mixture

 

This 76.49% of Fe is Fe_0.93O_1.0 is equal to the total amount cf Fe in 100g of mixture.