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April 14th, 2010, 07:33 AM   #1
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Titration Problem

7. The amount of iron in a meteorite was determined by a redox titration using KMnO 4 as the titrant. A
0.42811 g sample was dissolved in acid and the liberated Fe 3+ quantitatively reduced to Fe2+ .
Titrating with 0.02706 M KMnO4 requires 44.99 ml to reach the end point.
Determine the % w/w Fe2O3
Unbalance reaction: Fe2+ + MnO4- ? Fe3+ +Mn2+

hey guys im stumped on how to do this question, can anyone help me out?

Darpa.Chief is offline  
April 15th, 2010, 02:09 AM   #2
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Re: Titration Problem

Well, we know exactly how many moles of permanganate were required, and that seems pretty key. If only we knew the ratio of permanganate to iron was?
jason.spade is offline  

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