The function of fluorspar in the electrolytic | vedclass

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(B) The electrolysis of alumina is carried out in a steel tank lined with graphite,which acts as the cathode.The electrolyte consists of alumina $(Al_

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to lower the temperature of melt and to make the fused mixture very conducting

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(B) The electrolysis of alumina is carried out in a steel tank lined with graphite,which acts as the cathode.The electrolyte consists of alumina $(Al_2O_3)$ dissolved in fused cryolite $(Na_3AlF_6)$ and fluorspar $(CaF_2)$.Cryolite lowers the melting point of the mixture to approximately $950^{\circ}C$.Fluorspar $(CaF_2)$ is added to increase the fluidity of the molten mass and to make the mixture a better conductor of electricity.This allows the liberated aluminium metal to sink to the bottom of the cell for easy collection.

The function of fluorspar in the electrolytic reduction of alumina dissolved in fused cryolite $(Na_3AlF_6)$ is:

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