Using Electrolysis to Extract Metals (AQA GCSE Chemistry Combined Science): 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 certain metals from their ores?
Why is electrolysis used to extract certain metals from their ores?
They are too reactive for carbon reduction
What is bauxite?
What is bauxite?
The primary ore of aluminium
What is the chemical formula of aluminium oxide (bauxite)?
What is the chemical formula of aluminium oxide (bauxite)?
Why is cryolite mixed with bauxite during aluminium extraction?
Why is cryolite mixed with bauxite during aluminium extraction?
It lowers the melting point
What is the benefit of lowering the melting point with cryolite?
What is the benefit of lowering the melting point with cryolite?
Makes the process more energy-efficient
What type of electrodes are used in the electrolysis of bauxite?
What type of electrodes are used in the electrolysis of bauxite?
Graphite electrodes
Which ions are attracted to the cathode during electrolysis?
Which ions are attracted to the cathode during electrolysis?
Aluminium ions ()
What happens to aluminium ions at the cathode?
What happens to aluminium ions at the cathode?
They gain electrons (reduction)
Why does molten aluminium sink to the bottom of the cell?
Why does molten aluminium sink to the bottom of the cell?
It is denser than the surrounding mixture
Which ions are attracted to the anode during electrolysis?
Which ions are attracted to the anode during electrolysis?
Oxide ions ()
What happens to oxide ions at the anode?
What happens to oxide ions at the anode?
They lose electrons (oxidation)
What gases can be produced at the anode?
What gases can be produced at the anode?
Oxygen and carbon dioxide