How does electrolysis use electrical energy to cause chemical change?

Electrolysis is a process that converts electrical energy into chemical energy to drive reactions that would not otherwise occur spontaneously. This process takes place within an electrolytic cell, which consists of two electrodes submerged in an electrolyte—a solution or fused ionic compound.123

When a direct electric current is applied, the electrodes become oppositely charged, creating a flow of electrons that facilitates a redox reaction:42

• Reduction at the Cathode: The negatively charged electrode (cathode) supplies electrons to positive ions in the electrolyte, which combine with these electrons to become neutral atoms or new molecules.32
• Oxidation at the Anode: The positively charged electrode (anode) receives electrons from negative ions in the electrolyte, which are transformed into neutral particles or new molecules.32

Essentially, the electric current forces a spatial separation of oxidation and reduction, effectively transferring electrons from one species to another to produce chemical change. This method is widely used for metallurgical processes, such as the production of sodium and chlorine from molten salt or the extraction of hydrogen and oxygen from water.423