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3. A 0.3500 g sample of an iron ore was dissolved in acid and all the iron was reduced to Fe²+ . All the iron was then reoxidized to Fe³+ by titration with a 0.0950 M KMnO4 solution. If it required 5.50 mL of the KMnO4 to reach the end point in the titration, what was the percent iron in the ore sample?

3. A 0.3500 g sample of an iron ore was dissolved in acid and all the iron was reduced to Fe²+ . All the iron was then reoxidized to Fe³+ by titration with a 0.0950 M KMnO4 solution. If it required 5.50 mL of the KMnO4 to reach the end point in the titration, what was the percent iron in the ore sample?

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter19: Transition Metals And Coordination Chemistry
Section: Chapter Questions
Problem 11E: Iron (II) can be oxidized to iron (III) by dichromate ion, which is reduced to chromium (III) in...
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3. A 0.3500 g sample of an iron ore was dissolved in acid and all the iron was reduced to Fe2+. All the iron was then reoxidized to Fe³+ by titration with a 0.0950 M KMnO4 solution. If it required 5.50 mL of the KMnO4 to reach the end point in the titration, what was the percent iron in the ore sample?
Transcribed Image Text:3. A 0.3500 g sample of an iron ore was dissolved in acid and all the iron was reduced to Fe2+. All the iron was then reoxidized to Fe³+ by titration with a 0.0950 M KMnO4 solution. If it required 5.50 mL of the KMnO4 to reach the end point in the titration, what was the percent iron in the ore sample?
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