A 0.450-g sample of steel contains manganese as an impurity. The sample is dissolved in acidic solution

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A 0.450-g sample of steel contains manganese as an impurity. The sample is dissolved in acidic solution and the manganese is oxidized to the permanganate ion MnO4-. The MnO4-ion is reduced to Mn2+ by reacting with 50.0 mL of 0.0800 M FeSO4 solution. The excess Fe2+ ions are then oxidized to Fe3+ by 22.4 mL of 0.0100 M K2Cr2O7. Calculate the percent by mass of manganese in the sample.
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Chemistry

ISBN: 978-0077274313

10th edition

Authors: Raymond Chang

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