Question

Which ingredients are added to lower down the melting point of mixture of alumina?

PLZZ ANSWER!!!​

Answer 1

ᎪΝՏᏔᎬᎡ

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

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Answer 2

ᗩᑎᔕᗯEᖇ

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