Neco 2024 Chemistry Question 6
Practice objective / multiple choice question 6 from the 2024 Neco Chemistry examination.
A 0.500 g sample containing only Fe2O3 and Fe3O4 is dissolved in acid and titrated with 0.100 M KMnO4. The reaction in acidic medium is \(\mathrm{MnO_4^- + 5Fe^{2+} + 8H^+ \rightarrow Mn^{2+} + 5Fe^{3+} + 4H_2O}\). The titration required 2.00 mL of KMnO4 solution. Assuming all Fe2+ present originates from the FeO component of Fe3O4, calculate the percentage by mass of Fe3O4 in the original sample. Give your answer to two decimal places.
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About This Question
This is Neco 2024 Chemistry Question 6. It is one of the objective questions from the 2024 Neco Chemistry examination.
Difficulty level: Medium .
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