Refer to Example 5-10. Suppose that the KMnO 4 (aq) were standardized by reaction with As 2

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Refer to Example 5-10. Suppose that the KMnO4(aq) were standardized by reaction with As2O3 instead of iron wire. If a 0.1304 g sample that is 99.96% As2O3 by mass had been used in the titration, how many milliliters of the KMnO4(aq) would have been required?

As2O3 + MnO4- + H+ + H2O → H3AsO4 + Mn2+     (not balanced)

Example 5-10

A piece of iron wire weighing 0.1568 g is converted to Fe2+(aq) and requires 26.24 mL of a KMnO4(aq) solution for its titration. What is the molarity of the KMnO4(aq)?

5 Fe2+(aq) + MnO4-(aq) + 8 H+(aq) → 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l)

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General Chemistry Principles And Modern Applications

ISBN: 9780132931281

11th Edition

Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette

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