- Metals are often found in ores
- Ores are rock that contain enough of a certain mineral to make it worth mining.
- Some examples of ores are - Haematite (iron), chalcopyrite (copper), pyrolusite (Manganese) and Bauxite (Aluminium).
- Most ores are either Suphides or Oxides
- It is difficult to extract metals from sulphides so that are roasted in air to covert them into oxides.
- Sulphur Dioxide is produced as a result of roasting, however sulphur dioide is used as a raw material for sulphuric acid, which is used to make medicines, paints etc.
- Sulphuric acid is manufactured using the contact process. This uses a Vanadium (V) oxide catalyst.
- The most reactive metals are extracted using electrolysis. This is an expensive method as the cost of electricity is high.
- Carbon and sometimes hydrogen is used to extract the less reactive metals.
- Coke is almost pure carbon and is used to extract metals such as Iron, Manganese and…