Hall-Heroult Cell for the Production of Aluminium Key Concepts
Alumina, Al2 O3 , is extracted from the mineral bauxite using hot concentrated sodium hydroxide solution in the Bayer Process.
Alumina is dissolved in cryolite, Na3 AlF6 , 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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Related AUS-e-TUTE Topics Electrolysis of Molten Salts
Electrolysis of Aqueous Salt Solutuions
Electrolysis - Electrolytic Cells
Oxidation and Reduction
Displacement Reactions
Faraday's Laws of Electrolysis
Production of Sodium : Down's Cells
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