Chemistry unit 1- metals and their uses
- Created by: safia rassool
- Created on: 18-05-16 10:58
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- ore= rocks that contain enough metal or metal compound that it is worth extracting
- mining has huge effects on the environment and uses tonnes of energy therefore fossil fuels
- gold can be extracted by physical methods as its low in the reactivity series however some compounds have to be chemically extracted
- metals can be extracted by DISPLACEMENT of carbon this is when the more carbon replaces the gold, this is reduction as it removes the oxygen
- iron oxide is reduced in a blast furnace to form iron but this makes it too brittle as cast iron
- most iron is converted into alloys called steel as the properties are not too brittle but not too soft
- steel is a mixture of carbon + iron + other elements
- low carbon steel- easily shaped
- high carbon steel- hard
- Aluminium has a high reactivity but is resistant to corrosion (non ferrous)
- aluminium is more reactive than carbon so cannot be displaced by…
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