Q/ Calculate the concentration of an iron(II) sulphate solution, given that 20 cm3 of the solution reacts completely with 23.5 cm3 of 0.02 mol l-1 potassium permanganate solution, in the presence of acid. (Hint – you must decide which ion will be oxidised, which will be reduced, and write the redox equation before tackling the calculation).
I am not sure how to create the balanced equation? Also, I'm not sure what is being oxidised and reduced
FeSO4 is oxidised to Fe2(SO4)3 and KMnO4 is reduced to Mn(2+).
Write out the respective oxidation and reduction equations, using electrons, protons and water molecules where necessary to balance. Then equate the two redox equations in terms of equal electrons, combine and cancel the electrons, water and protons to get the overall balanced equation.