Question

In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as an electrolyte: 

(a) Which electrode is connected to the positive terminal of the battery? 

(b) Which electrode is connected to the negative terminal of the battery? 

(c) Which metal salt solution is taken as electrolyte?

Answer 1

(a) Thick rod of impure copper is connected to the positive terminal of the battery. 

(b) Thin plate of pure copper is connected to the negative terminal of the battery. 

(c) Copper sulphate solution is taken as electrolyte.