A 250 ML Aliquot of a Solution Containing Fe²⁺, Prepared During

question 43

Multiple Choice

A 25.0 mL aliquot of a solution containing Fe²⁺, prepared during an assay of a pyrite ore, was titrated to a faint purple endpoint by 32.2 mL of 0.020 M KMnO₄. What was the molarity of the Fe²⁺ solution? [The permanganate was reduced to Mn²⁺.]

• A) 0.13 M
• B) 0.19 M
• C) 0.26 M
• D) 0.31 M
• E) 0.47 M

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