C2 - Extraction Of Aluminium Flashcards
1
Q
What is used to lower the cost of electrolysing aluminium and why?
A
Cryolite - it lowers the temperature.
2
Q
What are the electrodes made of?
A
Graphite (carbon).
3
Q
What is formed at the negative electrode during aluminium electrolysis?
A
Aluminium.
4
Q
What is formed at the positive electrode during aluminium electrolysis?
A
Oxygen.
5
Q
What also happens at the positive electrode during the electrolysis of magnesium?
A
The oxygen reacts with the carbon electrode to produce CO2.
6
Q
How is aluminium removed from its ore?
A
Electrolysis.
