Displacement Reactions And Extracting Metals

Front 1

What is a displacement reaction

Back 1

A redox reaction

Front 2

What does the term redox mean

Back 2

Reduction and oxidation happen simultaneously

Front 3

What happens in a displacement reaction

Back 3

A more reactive element reacts to take the place of a less reactive element in a compound

the more reactive metal is oxidised and less reactive metal is reduced

Front 4

What is the metal ore

Back 4

A rock which contains enough metal to make it economically worthwhile extracting the metal from it

Front 5

How can some metals be extracted by reduction with carbon

Back 5

Metals below carbon in the reactivity series can be extracted by reduction using carbon because carbon can only take the oxygen away from metals which are less reactive than itself

Front 6

How do you extract metals that are more reactive than carbon

Back 6

Using electrolysis of molten compounds the metal or is melted and electrical current is passed through it the metal is this charge at the cathode and the non-metal at the anode

Front 7

What are the disadvantages of electrolysis as a method of extracting metals compare to reduction with carbon

Back 7

Electrolysis is more expensive as needs electricity and can be expensive to melt or dissolve the metal ore

Front 8

What are the biological methods to extract metals

Back 8

Bioleaching uses bacteria to separate metals from there ores

bacteria get energy from the bonds between the atoms separating out the metal from the in the process

the leachate (The solution produced by the process) contains metal ions which can be extracted with a more reactive metal

Front 9

What is another method of biologically extracting metals

Back 9

Phytoextraction growing plants and soil that contains metal compounds metals gradually build up in the leaves plants can be harvested dried and burned in furnace the ashes contain metal compounds from which the metal committee extracted by electrolysis or displacement reactions