Metal Extraction

Question 1

5 methods of extraction

Answer 1

carbon reduction, electrolysis, metal displacement, phytomining, bioleaching

Question 2

carbon reduction

Answer 2

carbon is more reactive than metal, displacement, metal is reduced, gold to zinc

Question 3

electrolysis

Answer 3

metal is dissolved in water or melted, electricity breaks up a compound into elements, carbon less reactive than metal

Question 4

metal displacement

Answer 4

metal displaces a less reactive metal from its compound

Question 5

phytomining

Answer 5

roots take in metal ions, producing metal oxides, harvested and burnt, sulphuric treats ash producing copper sulphate solution OR ash is heated with carbon producing copper, low grade ores

Question 6

bioleaching

Answer 6

bacteria feed on low grade ores, copper sulphate solution produced, electrolysis or displaced extracts copper