Science, asked by KINGCHAITANYA, 1 year ago

substance used to decrease the melting point of alumina in hall haroult process

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Answered by riturajbabu

Although a molten aluminium salt could be used instead, aluminium oxide has a melting point of 2072 °C so electrolysing it is impractical. In theHall–Héroult process, alumina, Al2O3, is dissolved in molten synthetic cryolite, Na3AlF6, to lower its melting point for easier electrolysis

Answered by riamsunil

Flourspar and cryolite

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