Chemistry C1 AQA Triple Award GCSE part 3
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- Created on: 20-06-14 12:41
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- Chemistry C1 AQA Triple Award GCSE
- using limestone
- limestone is mainly calcium carbonate (CaCO3)
- limestone is quarried out of the ground
- it is great for making blocks for building
- fine old buildings like cathedrals are made from these blocks
- its sturdy but does react
- it is great for making blocks for building
- when heated it thermally decomposes into calcium oxide and carbon dioxide
- calcium carbonate reacts with acid to make a calcium salt, carbon dioxide and water
- limestone is quarried out of the ground
- calcium oxide reacts with water to produce calcium hydroxide
- calcium hydroxide is an alkali
- this can be used to neutralise acidic soil
- powdered limestone can be used to do this too but calcium hydroxide is faster
- this can be used to neutralise acidic soil
- calcium hydroxide can be used to terst for carbon dioxide
- if you bubble gas through limewater and it turns cloudy carbon dioxide is present
- calcium hydroxide is an alkali
- limestone can make other things too
- powdered limestone is heated in a kiln with powdered clay to make cement
- limestone quarry
- limestone pic
- limestone is mainly calcium carbonate (CaCO3)
- using limestone continued
- quarrying limestone disrupts the environment
- digging limestone causes environmental problems
- it leaves huge holes in the landscape
- using explosives causes dust and loud noises in quiet areas
- quarrying destroys habitats
- positives
- limestone creates things people want
- houses, roads, dyes, paints and medicines
- limestone products used to neutralise acidic things
- soil, lakes, rivers and sulpher dioxide
- creates jobs
- once quarrying is complete landscaping and restoration of the area is required
- limestone creates things people want
- advantages and disadvantages
- advantages
- cheap
- easy to cut
- widely avaliable
- hard wearing
- attractive
- doesn't rot
- can't be gnawed away by insects and rodents
- fire resistant
- doesn't corrode
- disadvantages
- has a low tensile strength
- advantages
- quarrying limestone disrupts the environment
- using limestone
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