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Electrolytic Refining

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Question

Write the importance of cryolite in the extraction of aluminium iin electrolytic process

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Solution

Dear Student,
It is important to note that Cryolite (Na₃AlF₆) has two roles in the metallurgy of aluminium:
(i) To decrease the melting point of the mixture from 2300 K to 1150 K.
(ii) To increase the electrical conductivity of Al₂O₃.
Regards.

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