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October 21, 2014

Homework Help: chem

Posted by lara on Wednesday, April 11, 2012 at 6:22pm.

The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the end point.

Unbalance reaction: Fe2+ + MnO4- → Fe3+ + Mn2+.

Determine the % w/w Fe2O3.

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