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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) `2AI_(2) O_(3) + 3C to 4AI+ 3CO_(2)`
`AI_(2) O_(3) overset("electrolysis")(to) 2AI^3 + 3O^(2-)`
(ii) cryolite lowers the melting point of the mixture and increases the conductivity.
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