Explain why the extraction of aluminium in this way is reduction.
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Card 9
Front
Aluminium is extracted by the electrolysis of aluminium oxide. It is not possible to extract aluminium by heating aluminium oxide with carbon. Explain why.
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Card 10
Front
Why must the positive electrode be continually replaced?
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Card 11
Front
What advantages are there of recycling aluminium rather than extracting it from its ore?
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Card 12
Front
Why does the layer of aluminium oxide at aluminium's surface make it a very useful metal?
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Card 13
Front
Give two reasons why producing aluminium from this process can contribute towards global warming.
