Based upon what you know about acids and bases, and given that manganese will be reduced by sodium bisulfite, make a prediction about how the

Based upon what you know about acids and bases, and given that manganese will be reduced by sodium bisulfite, make a prediction about how the oxidation-reduction reaction will be affected by acidic, basic, or neutral media.

Specifically how the reduction of Mn (from KMnO4) is affected.