Electrolysis to extract metals (Edexcel GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 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 bauxite?
What is the chemical formula of bauxite?
Why is cryolite added to bauxite during aluminium extraction?
Why is cryolite added to bauxite during aluminium extraction?
It lowers the melting point
What type of electrodes are used in the electrolysis of aluminium?
What type of electrodes are used in the electrolysis of aluminium?
Graphite electrodes
Which ions are attracted to the cathode during electrolysis?
Which ions are attracted to the cathode during electrolysis?
ions
What happens to aluminium ions at the cathode?
What happens to aluminium ions at the cathode?
They gain electrons and are reduced
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 mixture
Which ions are attracted to the anode during electrolysis?
Which ions are attracted to the anode during electrolysis?
ions
What happens to oxide ions at the anode?
What happens to oxide ions at the anode?
They lose electrons and are oxidised
What gas is produced when oxide ions react with the graphite anode?
What gas is produced when oxide ions react with the graphite anode?
Carbon dioxide
What is the state of bauxite during the electrolysis process?
What is the state of bauxite during the electrolysis process?
Molten