Question

In the extraction of aluminum


a) Write the function and formula of cryolite .


b) Why is the anode replaced from time to time during the electrolysis of alumina ?


c) Draw a neat labeled diagram of electrolytic reduction of alumina.​

Answer 1

Answer:

a) enhances conductivity... CaF2

b) as electrodes are made up carbon therefore they are continuously consumed OR rather oxidised by oxygen formed at anode forming CO2 .