A compound contains only Fe and O. A 0.2729 g sample of the compound was dissolved in

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A compound contains only Fe and O. A 0.2729 g sample of the compound was dissolved in 50 mL of concentrated acid solution, reducing all the iron to Fe2+ ions. The resulting solution was diluted to 100 mL and then titrated with a 0.01621 M KMnO4 solution. The unbalanced chemical expression for reaction between Fe2+ and MnO4- is given below.

MnO4-(aq) + Fe2+(aq) → Mn2+(aq) + Fe3+(aq)     (not balanced)

The titration required 42.17 mL of the solution to reach the pink endpoint. What is the empirical formula of the compound?

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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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