Extraction

Question 1

High and medium reactivity metals are found as…

Answer 1

Ores

Question 2

Low reactivity metals are found as…

Answer 2

Pure

Question 3

Extraction of aluminium

Answer 3

1) aluminium ore is purified to produce aluminium oxide
2) electrolysis ( O^2- ions are attracted to the carbon ANODE (2O^2- —> O2 + 4e-), Al^3+ are attracted to the carbon CATHODE (Al^3+ + 3e- —> Al))

Question 4

Phytomining

Answer 4

1) copper ions are taken up from the soil and stored in plants
2) these plants are burned and copper ions are left behind in the ash
3) these are reacted with sulphuric acid and will undergo electrolysis or displacement reactions

Question 5

Bioloeaching

Answer 5

1) bacteria is used to break down the copper compounds in the soil, producing a leachate
2) the leachate can then be turned into a pure metal by electrolysis or displacement reactions