Hall-Heroult Cell for the Production of Aluminium
- Alumina, Al2O3, is extracted from the mineral bauxite using hot concentrated sodium hydroxide solution in the Bayer Process.
- Alumina is dissolved in cryolite, Na3AlF6, to lower the melting point.
- Aluminium is produced by the electrolysis of molten alumina in a Hall-Heroult cell.
- A Hall-Heroult Cell is a carbon lined reaction vessel which acts as the cathode with carbon anodes dipped into the alumina-cryolite electrolyte.
- The amount of aluminium produced can be calculated using Faraday's Laws of Electrolysis.
Hall-Heroult Cell Example
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|Electrolysis of Molten Salts
Electrolysis of Aqueous Salt Solutuions
Electrolysis - Electrolytic Cells
Oxidation and Reduction
Faraday's Laws of Electrolysis
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