What is the purpose of using a DC supply in electrolysis?

In electrolysis, a direct current (DC) supply is essential because it provides a steady voltage that allows the electrochemical reactions to take place consistently at the electrodes. The purpose of using DC in this context is to enable the separation of different products at the anode and cathode based on their respective electrochemical properties. When a direct current is applied, ions move towards the electrodes, and their reactions can be identified by observing the type of product formed at each electrode.

In electrolysis, different substances will be oxidized or reduced depending on their position in the electrochemical series. The ability to consistently supply DC allows for the identification of products as reactions can occur systematically, producing gases like oxygen and hydrogen, or causing deposition of metals. This identification of products is crucial in many applications of electrolysis, such as in electroplating and the production of chemicals.

While other factors like conductivity, reaction temperature, and gas formation are important in the overall process, they do not directly relate to the primary role of the DC supply in determining and allowing the identification of electrolysis products.