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Draw labelled diagram of Hall-Heroult el...

Draw labelled diagram of Hall-Heroult electrolytic cell for the extraction of aluminium write anode and cathode reactions.

Text Solution

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Reaction at anode :
`underset(("s"))(C)+underset(("melt"))(O^(-2))rarrunderset(("g"))(CO)+2e^(-)`
`underset(("s"))(C)+underset(("melt"))(2O^(-2))rarrunderset(("g"))(CO_(2))+4e^(-)`
Reaction at Cathode :
`underset(("melt"))(Al^(3+))+3e^(-)rarrunderset((l.))(Al)`
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