A solution of iron (II) salt containing 0.100 moldm-3 of Fe2+(aq) was freshly prepared. Portions of 25.0ml were titrated with a solution of potassium manganate (VII) of unknown concentration to a permanent pink end-point. The average titration reading was 24.40ml. Using these results, calculate the concentration of the potassium manganate (VII) solution used.
