Question

what is role of cryolite in the extraction of aluminium from bauxite?

Answer 1

Pure cryolite itself melts at 1012 °C (1285 K), and it can dissolve the aluminium oxides sufficiently well to allow easy extraction of the aluminium by electrolysis. ... As natural cryolite is too rare to be used for this purpose, synthetic sodium aluminium fluoride is produced from the common mineral fluorite.

Answer 2

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Here's your Answer...

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The difficulty of separating aluminiumfrom oxygen in the oxide ores was overcome by the use of cryolite as a flux to dissolve the oxide mineral(s). Pure cryolite itself melts at 1012 °C (1285 K), and it can dissolve thealuminium oxides sufficiently well to allow easy extraction of the aluminiumby electrolysis.
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