The amount of iron in a meteorite is determined by a redox titration using KMnO4 as the titrant. A 0.4185-g sample is dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+ using a Walden reductor. Titrating with 0.02500 M KMnO4 requires 41.27 mL to reach the end point. (a) Determine the %w/w Fe2O3 (MW = 159.69 g/mol) in the sample of meteorite. (b) Determine the %w/w Fe3O4 (MW = 231.533 g/mol) in the sample of meteorite.
The amount of iron in a meteorite is determined by a redox titration using KMnO4 as the titrant. A 0.4185-g sample is dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+ using a Walden reductor. Titrating with 0.02500 M KMnO4 requires 41.27 mL to reach the end point. (a) Determine the %w/w Fe2O3 (MW = 159.69 g/mol) in the sample of meteorite. (b) Determine the %w/w Fe3O4 (MW = 231.533 g/mol) in the sample of meteorite.
Chemistry by OpenStax (2015-05-04)
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ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter18: Representative Metals, Metalloids, And Nonmetals
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The amount of iron in a meteorite is determined by a redox titration using KMnO4 as the titrant. A 0.4185-g sample is dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+ using a Walden reductor. Titrating with 0.02500 M KMnO4 requires 41.27 mL to reach the end point.
(a) Determine the %w/w Fe2O3 (MW = 159.69 g/mol) in the sample of meteorite.
(b) Determine the %w/w Fe3O4 (MW = 231.533 g/mol) in the sample of meteorite.
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