Aluminium extraction (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
What form does aluminium exist in naturally?
What form does aluminium exist in naturally?
As bauxite ore
What is the main compound found in bauxite ore?
What is the main compound found in bauxite ore?
Aluminium oxide
Why can't carbon reduction be used to extract aluminium?
Why can't carbon reduction be used to extract aluminium?
Al is above C in reactivity series
Which method must be used to extract aluminium from its ore?
Which method must be used to extract aluminium from its ore?
Electrolysis
Why is cryolite mixed with aluminium oxide?
Why is cryolite mixed with aluminium oxide?
To lower the melting point
What forms at the cathode during aluminium extraction?
What forms at the cathode during aluminium extraction?
Aluminium metal
What forms at the anode during electrolysis?
What forms at the anode during electrolysis?
Oxygen gas
What does oxygen produced at the anode react with?
What does oxygen produced at the anode react with?
The carbon anode
Why do the carbon anodes need regular replacement?
Why do the carbon anodes need regular replacement?
They get used up reacting with oxygen
What is the main reason aluminium extraction is expensive?
What is the main reason aluminium extraction is expensive?
Huge amounts of electricity needed
How are moderately reactive metals like zinc and iron extracted?
How are moderately reactive metals like zinc and iron extracted?
Heating with carbon
What happens to the aluminium metal formed at the cathode?
What happens to the aluminium metal formed at the cathode?
It sinks to the bottom