Neco 2017 Chemistry Question 26
Practice objective / multiple choice question 26 from the 2017 Neco Chemistry examination.
In an acidic solution, 50.0 mL of an aqueous mixture contains \( \mathrm{Fe^{2+}} \) ions and \( \mathrm{Cr^{2+}} \) ions. The mixture is titrated with 0.0250 M \( \mathrm{KMnO_{4}} \). The titration reaches the endpoint after 20.0 mL of \( \mathrm{KMnO_{4}} \). It is known that the concentration of \( \mathrm{Fe^{2+}} \) is twice that of \( \mathrm{Cr^{2+}} \). Calculate the concentration of \( \mathrm{Fe^{2+}} \) in the mixture (expressed in mol L^{-1} to three significant figures).
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About This Question
This is Neco 2017 Chemistry Question 26. It is one of the objective questions from the 2017 Neco Chemistry examination.
Difficulty level: Medium .
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