Salt Bridge
| Also Known As | Electrolytic bridge, ion bridge, junction bridge |
|---|
What is Salt Bridge?
A device used in electrochemical cells to maintain electrical neutrality by allowing ion flow between two half-cells. It typically consists of a U-tube filled with a gel or saturated salt solution (e.g., KCl in agar). Without it, charge would build up and stop the cell reaction.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A device used in electrochemical cells to maintain electrical neutrality by allowing ion flow between two half-cells. It typically consists of a U-tube filled with a gel or saturated salt solution (e.g., KCl in agar). Without it, charge would build up and stop the cell reaction.
Salt bridges are used in galvanic cells to complete the circuit while keeping the half-cell solutions separate. They are components in reference electrodes used in pH meters and other electroanalytical instruments. Research laboratories use salt bridges in electrochemical experiments.
The electrolytes used in salt bridges (KCl, KNO₃) are generally low-toxicity but should not be ingested. Salt bridge solutions should be disposed of properly according to laboratory waste protocols.