Pages in this set

Page 1

Preview of page 1
SULPHIDE ORES ARE USUALLY CONVERTED TO
OXIDES FIRST
An ore is a natural substance that a metal can be economically extracted from.
Metals are often found in ores as sulphides (such as lead sulphide and zinc sulphide)
or oxides (like titanium dioxide and iron(III) oxide). The metal element needs to…

Page 2

Preview of page 2
MnO2 + 2CO Mn 2CO2
This needs higher temperatures than iron(III) oxide ­ about 1200°C.


REDUCTION OF COPPER CARBONATE
Copper can be extracted using carbon. One ore of copper is malachite, containing CuCO3.
This can be heated directly with carbon:
2CuCO3 + C 2Cu + 3CO2
Another method involves heating…

Page 3

Preview of page 3
ADVANTAGES AND DISADVANTAGES OF REDUCTION
WITH HYDROGEN
Advantages Disadvantages
It produces very pure tungsten The energy costs are high
Using a flammable gas such as hydrogen at
Hydrogen is a cheap reagent
high temperatures is very dangerous



ALUMINIUM IS EXTRACTED BY ELECTROLYSIS
Aluminium is too reactive to extract using reduction…

Page 4

Preview of page 4
The cost of melting the aluminium and
It is a continuous process, so is efficient supplying the energy for electrolysis is very
high
It makes the metal in a pure form It only works for ionic oxides



TITANIUM
Titanium is an abundant metal in the Earth's crust. In its pure…

Page 5

Preview of page 5

Advantages of Recycling Metals Disadvantages of Recycling Metals
Saves raw materials ­ ores are a finite Collecting and sorting metals from other
resource waste can be difficult and expensive
Saves energy ­ recycling metals takes less
The purity of recycled metal varies ­ there is
energy than extracting metal. This…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »