Question

explain in detail the role of:
(1)cryolite in the electrolytic reduction of alumina.
(2)carbon monoxide in the purification of nickel.​

Answer 1

Answer:

1. The melting point of alumina very high (2323 K). It is therefore, mixed with cryolite (Na3AIF6) which lowers its melting point to 1173 K. Moreover, cryolite also increase the electrical conductivity of alumina.
2. role of carbon monoxide in the purification of nickel. The mind process some time known as the carbonyl process, is a technique created by ludwig Mond To extract and purify nickel The impure nickel react with carbon monoxide at 50-60 c to form the gas nickel carbonyl, leaving the impurities as solids.