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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 increase conductivity.
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