Extracting Aluminium by Electrolysis | GCSE Chemistry
Aluminium is more reactive than carbon, so it must be extracted using electrolysis of molten aluminium oxide.
Why is cryolite added to the aluminium oxide before electrolysis?
What is Extracting Aluminium by Electrolysis | GCSE Chemistry?
"The industrial process of extracting aluminium from bauxite ore using electrolysis."
Which of these metals is the MOST reactive?
Zinc is extracted from its ore by heating with carbon. This is because...
Which of these metals will NOT react with dilute acid?
In electrolysis, where do the positive ions (cations) move to?
Aluminium Extraction
Aluminium oxide has a very high melting point.
Cryolite is added to lower the melting point and save energy.
Aluminium forms at the cathode (negative electrode).
Oxygen forms at the anode and reacts with the graphite to form CO2.
Industrial Fact: The graphite anodes must be replaced regularly because they burn away in the oxygen.
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