[ajax0604]

In the half equation H2SO3 + H2O --> SO42- + 4H+ 2e-, H+ ions are generated, so would an acidified permanganate solution still be necessary? Thank you

[Borek]

Rule of thumbs says that permanganate gets reduced to MnO₄^- in basic solutions, MnO₂ in neutral solutions and Mn²⁺ in acidic solution, so it all depends on how far you want it reduced.