11. Electrolysis

Definitions
  • Electrolyte: An ionic compound conducts an electric current when in molten or aqueous state and is decomposed in the process.
  • Electrode: The rod or plate where electricity enters or leaves an electrolyte during electrolysis. Reactions occur at the surface of the electrodes. Not in the electrolyte.
  • Anode: Positive electrode connected to positive terminal of the battery. Oxidation occurs at the anode.
  • Cathode: Negative electrode connected to negative terminal of the battery. Reduction occurs at the cathode.
  • Anion: The ion with a negative charge which is attracted to the anode.
  • Cation: The ion with a positive charge which is attracted to the cathode.

Reactions at Anode and Cathode
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