A 1.362 g sample of an iron ore that contained FezOawas dissolved in acid and all of the iron was reduced to Fe2*. The solution was then acidified with H2SO4and titrated with 39.42 ml of 0.0281 M KMNO4, which oxidized the iron to Fe. The net ionic equation for the reaction is 5FE2+ + MnO+ 8H* 5F 3+ + Mn2 +4H20 What was the percentage by mass of iron in the ore? What was the percentage by mass of Fe30gin the ore? Part 1 X Your answer is incorrect. Calculate the number of moles of permanganate ion in the solution given. moles MnO4 Attempts: 1 of 1 used

Chemistry: Principles and Reactions
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Chapter4: Reactions In Aqueous Solution
Section: Chapter Questions
Problem 74QAP: A solution contains both iron(II) and iron(III) ions. A sample Of the solution is titrated with 35.0...
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A 1.362 g sample of an iron ore that contained FegO4was dissolved in acid and all of the iron was reduced to Fe2*. The solution was
then acidified with H2SO4 and titrated with 39.42 mL of 0.0281 M KMN04, which oxidized the iron to Fe. The net ionic equation for
the reaction is
5Fe2* + MnO4 + 8H*
5FE3+ + Mn2+ + 4H2O
What was the percentage by mass of iron in the ore?
What was the percentage by mass of Fe30z in the ore?
Part 1
X Your answer is incorrect.
Calculate the number of moles of permanganate ion in the solution given.
moles MnO4
Attempts: 1 of 1 used
Part 2
Using the previous answer and the balanced equation, find the number of moles of Fe".
mol Fe2+
Transcribed Image Text:A 1.362 g sample of an iron ore that contained FegO4was dissolved in acid and all of the iron was reduced to Fe2*. The solution was then acidified with H2SO4 and titrated with 39.42 mL of 0.0281 M KMN04, which oxidized the iron to Fe. The net ionic equation for the reaction is 5Fe2* + MnO4 + 8H* 5FE3+ + Mn2+ + 4H2O What was the percentage by mass of iron in the ore? What was the percentage by mass of Fe30z in the ore? Part 1 X Your answer is incorrect. Calculate the number of moles of permanganate ion in the solution given. moles MnO4 Attempts: 1 of 1 used Part 2 Using the previous answer and the balanced equation, find the number of moles of Fe". mol Fe2+
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