A Piece of Iron Wire Weighing 1

question 16

Multiple Choice

A piece of iron wire weighing 1.63 g is converted to Fe²⁺(aq) and requires 21.9 mL of KMnO₄ solution for its titration.What is the molarity of the KMnO₄ solution? The reaction occurring during the titration is:
5 Fe²⁺ (aq) + MnO₄^- (aq) + 8 H⁺ (aq) → 5 Fe³⁺ (aq) + Mn²⁺ (aq) + 4 H₂O

• A)1.33 M
• B)0.267 M
• C)2.67 × 10^-4 M
• D)14.9 M
• E)1.33 × 10^-3 M

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