A salt bridge is a component of an electrochemical cell that helps to maintain electrical neutrality and prevent a build-up of charge. It is typically made up of a tube or other structure that contains an electrolyte solution, often a salt solution, that allows for the transfer of ions between the two half-cells of the electrochemical system. The ions move through the salt bridge to balance out the charges in the two half-cells, helping to facilitate the exchange of electrons and the generation of an electric current. Without a salt bridge, the electrochemical reaction may not be able to continue indefinitely, as the charges can become imbalanced and the reaction can stall or shut down completely.
