Assume that the iron in iron ore a mixture of iron and

Question

Assume that the iron in iron ore (a mixture of iron and other substances) is in the form of Fe³⁺. The iron content of iron ore can be determined by dissolving the iron ore in HCl. The dissolved Fe³⁺ (aq) from the iron ore is then reduced to Fe²⁺

e^- + Fe³⁺ → Fe²⁺

This solution is then titrated with KMnO₄ (aq).

8 H⁺ (aq) + 5 Fe²⁺ (aq) + MnO₄^- (aq) → Mn²⁺ (aq) + 5 Fe³⁺ (aq) + 4 H₂O (l)

Suppose a 0.6128 g sample of iron ore is dissolved in HCl (aq), reduced, and titrated with   41.95 mL of 0.0205 M KMnO₄ (aq). What is the mass percent of iron in the iron ore sample?