Question

Please friends help me with this question i need the answers right now..




8. The following is a sketch of an electrolytic cell used in the extraction of aluminium.
a. What is the substance used in preparing electrodes A and B?
b. At which electrode (A or B) is aluminium formed?
c. Name the two aluminium compounds used as an electrolyte C.
d. Why is it necessary for electrode B to be continuously replaced?​

Answer 1

a) Carbon or Graphite is used for making Electrode A and B.

b) It is formed on A (Cathode).

c) Pure alumina(Al2O3) and cryolite(Na3AlF6)

d) Electrode B has to be replaced periodically as it gets oxidized by the oxygen to carbon dioxide at the anode.

Hope it helps......✌