Salt Bridge
What is Salt Bridge?
A salt bridge is a device (usually a U-shaped tube filled with an electrolyte solution such as KNO₃ or KCl in agar gel) used in electrochemical cells to maintain electrical neutrality by allowing ion flow between the two half-cells without the solutions mixing. Without a salt bridge, charge build-up would halt the cell reaction. The ions in the bridge migrate to balance the charge as the reaction proceeds.
Key Facts
Frequently Asked Questions
A salt bridge is a device (usually a U-shaped tube filled with an electrolyte solution such as KNO₃ or KCl in agar gel) used in electrochemical cells to maintain electrical neutrality by allowing ion flow between the two half-cells without the solutions mixing. Without a salt bridge, charge build-up would halt the cell reaction. The ions in the bridge migrate to balance the charge as the reaction proceeds.