Changes at the Electrodes

• Half-equation for at the Cathode (HIGHER):

  2H(+) + 2e(-) -> H2
• Symbol equation for at the anode:

  4OH- (aq) -> 2H2O (l) + O2 (g) + 4e-
• Oxygen

  Is

  Loss

  Reduction

  Is

  Gain

  (FOR TRANSFERS OF ELECTRONS)
• In electrolysis, the metal that forms the cathode will be reduced, while the metal forming the anode will be oxidized.