試題詳解

13. A 0.739-g sample of an iron ore is dissolved in acid. The iron is then reduced to Fe²⁺ and titrated with 47.22 mL of 0.02242 M KMnO₄ solution. Calculate the results of this analysis in terms of % Fe (55.847 g/mol).
(A) 16
(B) 22
(C) 32
(D) 40
(E) 50