Cambridge O Level
3 UCES 2020 5070/42/M/J/20 [Turn over The equation for the reaction is shown. MnO 4 – + 5Fe2+ + 8H+ Mn2+ + 5Fe3+ + 4H 2O (i) Suggest why dilute sulfuric acid is added to the conical flask. [1] (ii) Give the formula of the ion responsible for the pink colour seen at the end-point. [1] (iii) The diagrams show parts of apparatus A with the liquid levels at the beginning and the ................
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