What volume of 0.200 M potassium permanganate ( $K M n O_{4}$ ) solution is required to completely oxidize 50.0 mL of 0.100 M iron(II) sulfate ( $F e S O_{4}$ ) in acidic medium? ( $5 F e^{2 +} + M n O_{4}^{-} + 8 H^{+} \to 5 F e^{3 +} + M n^{2 +} + 4 H_{2} O$ )

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