Question

What is salt bridge? What are its functions in a galvanic cell?

Answer 1

A salt bridge, in electrochemistry, is a laboratory device used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell), a type of electrochemical cell. It maintains electrical neutrality within the internal circuit, preventing the cell from rapidly running its reaction to equilibrium.

Answer 2

Answer:Salt bridge is an inverted U-shaped glass tube filled with saturated Kcl or KNO3  or NH4NO3 solution in agar agar gel and cotton  or glass wool plugs at both ends

Functions of salt bridge

i) It completes the circuit of the cell .

ii) It connects solutions of two half cells in a cell.

iii) It avoids physical mixing of solutions of two half cells.

iv) It maintains electrical  neutrality of solutions of two half cells.

v) It minimizes development of Liquid-Liquid junction.

vi) potential betweem half cell solutions

Explanation: