What is the role of cryolite (Na^3AIF^6) in the electrolytic reduction of alumina in Hall’s process?
What is the role of cryolite (Na3AIF6) in the electrolytic reduction of alumina in Hall’s process?
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The role of cryolite in the electrolytic reduction of alumina in Hall's process is :
1. Lowers the fusion temperature from 2050°C to 950°C and enhances conductivity.
2. Increases its conductivity since pure alumina is almost a non-conductor of electricity.
3. Cryolite acts as a solvent for the electrolytic mixture.
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