Electrolysis to extract metals from oxides (1) Flashcards
(6 cards)
1
Q
Which two chemical processes are used to extract metals from their ores?
A
Reduction with carbon
Electrolysis
2
Q
How is a metal extracted from a metal compound using electrolysis?
A
A compound is split into its elements using electricity
3
Q
Why is electrolysis not used to extract all metal?
A
Electrolysis is expensive because it requires a large amount of energy
4
Q
When should a metal be extracted by carbon reduction?
A
When the metal is less reactive than carbon
5
Q
Which method of reaction would be used to extract iron?
A
Carbon reduction
6
Q
What is the name of the substance that is mixed with aluminium oxide to lower its boiling point?
A
Cryolite
