Question

Describe the method for the purification of colloidal sol containing excess amount of electrolytes with diagram :

Answer 1

Electrodialysis is the method for the purification of colloidal sol containing excess amount of electrolytes. From semipermeable membrane, a bag is made. It is filled with colloidal solution and suspended in fresh water. The electrolyte particles pass through the membrane and the colloidal solution is left behind. An electrical field is applied that makes movement of ions.