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Explain the role of cryolite in the elec...

Explain the role of cryolite in the electrolytic reduction of alumina.

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Cryolite `(Na_(3)AlF_(6))` reduces the melting point of alumina `(Al_(2)O_(3))` and also makes it good conductor of electricity.
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The funciton of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to :

(a) Name the role of Na_(3)AlF_(6) in the electrolytic reduction of alumina. (b) How does the FeO impurity present in sulphide ore of copper is removed ?

Cryolite is used in the electrolytic extraction of aluminium

DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Questions From Board Examinations
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  3. Explain the role of cryolite in the electrolytic reduction of alumina.

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  16. (a) What role does cryolite play in Hall Harnoult process ? (b) How ...

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  17. Give one example each of (i) acidic flux (ii) basic flux.

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