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Aluminium - Electrolytic Reduction of Refused Alumina

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  • Key Points: Electrolytic Reduction of Refused Alumina
CISCE: Class 10

Key Points: Electrolytic Reduction of Refused Alumina

  • Cell Setup: Iron tank with carbon lining (cathode) and graphite rods (anode).
  • Electrolyte: Molten mix of alumina, cryolite, and fluorspar at 950°C.
  • Main Reactions: Aluminium forms at the cathode; oxygen at the anode forms CO and CO₂.
  • Cryolite & Fluorspar: Lower melting point and improved conductivity.
  • Powdered Coke: Prevents heat loss and protects the anode.
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