Extraction of Aluminum

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chemistry 12th class cbse notes

Extraction of Aluminum:

Alumina Al2O3 is mixed with Na3AlF6 or CaF2 which lowers the melting point of the mixture and brings conductivity. Fused mixture is electrolyzed. Steel cathode and graphite anode is used. The graphite anode is used for the reduction of metal, the overall reaction is as follow-

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