Potassium permanganate, KMnO4(permanganate ion, MnO4-)

• The reduction half-reaction represents the process of gaining electrons, causing the purple permanganate ion to be reduced to the colorless manganese(II) ion.

• This reaction occurs under acidic conditions (in the presence of H+ ions).
• The standard reduction potential, Eo, for this reaction is +1.51V, indicating that it is a spontaneous reaction.
• The overall reaction involves the transfer of 5 electrons from the permanganate ion to form the manganese(II) ion.
• The solution changes color from purple to colorless as the permanganate ion is reduced.