The function of a salt bridge is to .

Options

A. eliminate the impurities present in the electrolyte
B. eliminate liquid-junction potential where the ions are present in excess at the junction
C. decrease the cell potential at the negative electrode
D. increase the cell potential at the positive electrode

Answer

B

Explanation

A salt bridge can be any medium through which ions can slowly pass . A salt bridge can be made by bending a piece of glass tune into the shape of a ''U'' , filling it with a hot saturated salt `//5%` agar-agar solution, and allowing it to cool. The cooled mixture ''sets'' to the consistency of firm gelatin. As a result, the solution does are still able to move. A salt bridge serves three functions :
(a) It allows electrical contact between the two solutions.
(b) It prevents mixing of the electrode solutions.
(c ) It maintains the electrical neutrality in each half-cell as ions flow into and out of the salt bridge.