The vanadium in a sample of ore is converted to VO2+. The VO2+ ion is subsequently titrated with MnO4− in acidic solution to form V(OH)4+ and manganese(II) ion. The unbalanced titration reaction is
To titrate the solution, 26.45 mL of 0.02250 M MnO4− was required. If the mass percent of vanadium in the ore was 58.1 %, what was the mass of the ore sample? Hint: Balance the titration reaction by the oxidation states method.
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