A sample of an iron ore is dissolved in acid, and the iron is converted to Fe2+. The sample is then titrated with 47.20 mL of 0.02240 M MnO4- solution. The oxidation-reduction reaction that occurs during titration is  MnO4-(aq) + 5 Fe2+(aq) + 8 H+(aq) → Mn2+(aq) + 5 Fe3+(aq) + 4 H2O(l) (a) How many moles of MnO4- were added to the solution? (b) How many moles of Fe2+ were in the sample?

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A sample of an iron ore is dissolved in acid, and the iron is converted to Fe2+. The sample is then titrated with 47.20 mL of 0.02240 M MnO4- solution. The oxidation-reduction reaction

that occurs during titration is 

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

(a) How many moles of MnO4- were added to the solution?

(b) How many moles of Fe2+ were in the sample?

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