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May 23, 2015

Homework Help: Chemistry

Posted by tam on Wednesday, March 9, 2011 at 11:27pm.

A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 of the 0.020M KMnO4 was needed. Calculate the concentrations of:
Fe2+ ions and Fe3+ ions in the solution

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