Electrolysis

• Electrolysis is the breakdown of an ionic compound, molten or in solution, by the passage of electricity through it.

• The substance which is decomposed is called the electrolyte.

• Electrolyte: The substance that conducts electricity when in the molten state or in solution.

Electrodes

• Electric current enters and leaves the electrolyte through electrodes.

• These are made up of unreactive metals such as platinum or the non-metal carbon (Graphite).

• These are also known as inert electrodes.

• Cathode attract cations (+ vely charged ions) known as positive electrode.

• Anode attract anions (- vely charged ions) is known as negative electrode.

How the transfer of charge occur during electrolysis?

• Movement of electrons in the electrodes.

• Removal and addition of electrons from the external circuit at the electrodes.

• Movement of ions in the electrolyte