Extraction of Aluminium Flashcards
Electrolysis is used to _______ aluminium from its ore.
Remove.
Aluminium is found _________ as a compound.
Naturally.
Bauxite is?
Aluminium Oxide Ore.
What is cryolite and what is it used for?
Cryolite is a less common ore of aluminium, it’s used to lower the temperature and the cost of the process of extracting aluminium from its ore.
What would be the melting point of aluminium oxide without the aid of cryolite?
2000 degrees celsius.
Cryolite brings the melting point down to about?
900 degrees celsius.
What are the electrodes made of in the process of removing aluminium oxide from its ore?
Graphite (carbon), good conductor of electricity.
Where does Aluminium form during the process of extracting it from its ore?
Negative electrode because it gains 3 electrons there.
Where does Oxygen form during the process of extracting Aluminium from its ore?
Positive electrode.
What happens to the oxygen after it’s produced?
It reacts with the carbon in the electrodes to form carbon-dioxide.
