Using Electrolysis to Extract Metals (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
10 questions from this quiz
Why is electrolysis used to extract aluminium from its ore?
Why is electrolysis used to extract aluminium from its ore?
It's too reactive for carbon reduction
What is the name of the primary ore of aluminium?
What is the name of the primary ore of aluminium?
Bauxite
What is the chemical formula of aluminium oxide in bauxite?
What is the chemical formula of aluminium oxide in bauxite?
Why is cryolite added to bauxite during aluminium extraction?
Why is cryolite added to bauxite during aluminium extraction?
To lower the melting point
What type of electrodes are used in the electrolysis of bauxite?
What type of electrodes are used in the electrolysis of bauxite?
Graphite
What happens to aluminium ions at the cathode?
What happens to aluminium ions at the cathode?
They gain electrons and are reduced
What is the product formed at the cathode during aluminium extraction?
What is the product formed at the cathode during aluminium extraction?
Molten aluminium
Why does molten aluminium sink to the bottom of the cell?
Why does molten aluminium sink to the bottom of the cell?
It's denser than the surrounding mixture
What happens to oxide ions at the anode?
What happens to oxide ions at the anode?
They lose electrons and are oxidised
How is carbon dioxide formed during aluminium extraction?
How is carbon dioxide formed during aluminium extraction?
Oxide ions react with carbon in anode