Question

Which of the following is the function of a salt bridge?

• A. Completes the circuit
• B. Prevents mechanical mixing of two solutions
• C. Minimises liquid junction potential
• D. All of the above

Answer 1

The correct option is D All of the above

Salt bridge is a U–shaped inverted tube that contains a gel (paste of agar-agar powder) permeated with an inert electrolyte.
These salt bridge electrolytic ions will polarise some of the oppositely charged ions in the solution towards themselves and keeps the cell working.

Functions of salt bridge:
1. It completes the circuit.
2. It prevents mechanical mixing of two solutions.
3. It maintains electrical neutrality to give continuous electron flow.
4. Minimises liquid junction potential