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OpenStudy (anonymous):

PLEASE HELP ME I'LL GIVE A MEDAL!! A 1.57 g sample of fencing wire consists mostly of iron. the sample was dissolved in sulfuric acid and the resulting solution made up to exactly 250 ml. this solution reacted completely with 270 ml of 0.020 mol/L KMnO4 solution. Determine the percentage of iron in the wire. Mno4 + 5Fe + 8H >> Mn + 5Fe + 4H2O

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