Extraction of Aluminium

• Cryolite is used in the electrolysis of aluminium oxide to lower the melting point and increase conductivity
• Carbon anodes need to be replaced after use as they burn away from the oxygen reacting with the carbon
• What is the use of Cryolite?


  To reduce the mlting point for aluminium oxide
• Why does extraction of aluminium from aluminum oxide require so much energy?


  Due to the strength of the chemical bond between aluminum and oxygen, and the high melting point of aluminum oxide
• Extraction of aluminium:

  A) Bauxite

  B) Aluminum Oxide

  C) Aluminium