123. Solving a chemistry problem
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123. Solving a chemistry problem
8. What volume of potassium permanganate KMnO4 is sufficient for the oxidation of iron in the form of Fe2+ from a sample of ore weighing 0.40 g, containing about 50 wt. % iron? The concentration of the working solution with (1/5 KMnO4)=0.1 mol/l.
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