Question

A conductivity cell is platinised

(a) to prolong its service.

(b) to avoid temperature effects. 

(c) to avoid polarisation effect. 

(d) None of the above

Answer 1

(c) to avoid polarisation effect. 

Electrodes of the cell are made of platinum and are coatedx freshly electrolytically with finely divided platinum black before use to minimize the polarization effect.