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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?

thanks
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?
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