The quantity of iron (II) in solution can be determined by titration with perman

Question

The quantity of iron (II) in solution can be determined by titration with permanganate (MnO4–). The permanganate is reduced to manganese (II) and the iron is oxidized to iron (III) in the process. If it requires 20 mL of 0.05 M MnO4– to titrate 50 mL of an unknown iron (II) solution, determine the concentration of Fe2+ in the unknown.: * A. 0.01 M Fe2+ B. 0.02 M Fe2+ C. 0.05 M Fe2+ D. 0.1 M Fe2+ The quantity of iron (II) in solution can be determined by titration with permanganate (MnO4–). The permanganate is reduced to manganese (II) and the iron is oxidized to iron (III) in the process. If it requires 20 mL of 0.05 M MnO4– to titrate 50 mL of an unknown iron (II) solution, determine the concentration of Fe2+ in the unknown.: * A. 0.01 M Fe2+ B. 0.02 M Fe2+ C. 0.05 M Fe2+ D. 0.1 M Fe2+

Explanation / Answer

1 eq of Fe(II) reacts with 1 eq of MnO4- ion

So V1M1 = V2 M2

M2 = 20 mL * 0.05 M / 50 mL

M2 = 0.02 M of Fe(II)

Answer option B)

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