What is the main role of the indifferent electrode in electrolysis?

The main role of the indifferent electrode in electrolysis is to close the circuit. In an electrolysis setup, there are typically two electrodes: the anode and the cathode. The indifferent electrode, often functioning as a reference point, ensures that the complete electrical circuit is established, allowing the flow of current through the electrolyte. This flow of current is involved in the electrolytic process where chemical changes occur.

While the indifferent electrode can conduct electricity, its primary function is to facilitate the circuit's closure rather than actively participating in the reduction or oxidation reactions occurring at the other electrodes. Thus, it plays a crucial role in maintaining the continuous flow of current necessary for the electrolysis process to take place effectively.