[scheikunde] ijzer oxides ( redox titratie)
Moderators: ArcherBarry, Fuzzwood
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- Berichten: 1
[scheikunde] ijzer oxides ( redox titratie)
Opgave:
A product contains magnetite (Fe3O4 = Fe2O3.FeO), ferric oxide and nonreducible oxides by permanganate. A sample of 0.600 g is dissolved after fusion and the iron in solution is reduced in acid environment. After elimination of the excess of reducer, a potentiometric titration of Fe(II) by KMnO4 0.02 mol/l needs 42 ml of this solution. In addition a sample of 1.000 g is dissolved in H2SO4 + HF in inert atmosphere to avoid any oxidation of Fe(II). The solution is simply diluted and the titration of Fe(II) consumes 20 ml of the KMnO4 solution.
Gevraagd:
a) Calculate the percentages in weight of magnetite and ferric oxide in the sample.
Is de gebruikt volume om het aantal mol MnO4- te bereiken 20ml of is dat de 42 ml?
Is de massa van het sample 1,6 g of is dat alleen de 1,000 g?
A product contains magnetite (Fe3O4 = Fe2O3.FeO), ferric oxide and nonreducible oxides by permanganate. A sample of 0.600 g is dissolved after fusion and the iron in solution is reduced in acid environment. After elimination of the excess of reducer, a potentiometric titration of Fe(II) by KMnO4 0.02 mol/l needs 42 ml of this solution. In addition a sample of 1.000 g is dissolved in H2SO4 + HF in inert atmosphere to avoid any oxidation of Fe(II). The solution is simply diluted and the titration of Fe(II) consumes 20 ml of the KMnO4 solution.
Gevraagd:
a) Calculate the percentages in weight of magnetite and ferric oxide in the sample.
Is de gebruikt volume om het aantal mol MnO4- te bereiken 20ml of is dat de 42 ml?
Is de massa van het sample 1,6 g of is dat alleen de 1,000 g?
- Berichten: 4.771
Re: [scheikunde] ijzer oxides ( redox titratie)
Het zijn twee aparte titraties, een met 42 ml voor die 0,600 g en een met 20 ml voor die 1,000 g.