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In the extraction of Aluminimum by elect...

In the extraction of Aluminimum by electrolysis.
i. Give the composition of electrolyte used
ii. Overall cell reaction
iii. Role of cryolite

Text Solution

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(i) Molten `Al_(2)O_(3)+Na_(3)AlF_(6)//CaF_(2)`.
(ii) Overall cell reaction. `2Al_(2)O_(3)to 4Al+3O_(2)`
(iii) Lowers the m.p. of the electrolyte OR increases conductivity.
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