The iron in a sample of iron ore can be converted completely to Fe2+ in aqueous solution, and this solution can then be titrated with KMnO4, as shown:  MnO4- (aq) + 5 Fe2+(aq) + 8 H3O+ (aq) → Mn2+ (aq) + 5 Fe3+(aq) + 12 H2O  If a 1.206-g sample of iron ore requires 26.37 mL of 0.0115 M KMnO4 to reach the equivalence point,  what is the mass of the Fe2+ (assume that the mass of Fe2+ is the same as that of Fe; 55.85 g/mol).

Chemistry & Chemical Reactivity
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Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions
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The iron in a sample of iron ore can be converted completely to Fe2+ in aqueous solution, and this solution can then be titrated with KMnO4, as shown:

 MnO4(aq) + 5 Fe2+(aq) + 8 H3O+ (aq) → Mn2+ (aq) + 5 Fe3+(aq) + 12 H2O

 If a 1.206-g sample of iron ore requires 26.37 mL of 0.0115 M KMnOto reach the equivalence point,  what is the mass of the Fe2+ (assume that the mass of Fe2+ is the same as that of Fe; 55.85 g/mol).

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