Limestone

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  • Created by: beth
  • Created on: 30-12-12 22:34
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  • LIMESTONE
    • Is mainly CALCIUM CARBONATE (CaCO3)
      • Calcium Carbonate reacts with ACID to make CALCIUM SALT, CARBON DIOXIDE and WATER
        • Calcium Carbonate + Sulfuric Acid > Calcium Sulfate + Carbon Dioxide + Water
        • The type of salt produced is dependent on the acid used (E.g. If HYDROCHLORIC ACID was used, it would make a CHLORIDE
    • When heated, it THERMALLY DECOMPOSES to make CALCIUM OXIDE and CARBON DIOXIDE
      • Calcium Carbonate > Calcium Oxide + Carbon Dioxide
        • CaCO3> CaO+CO2
    • CALCIUM OXIDE
      • CALCIUM OXIDE reacts with WATEr to produce CALCIUM HYDROXIDE
        • Calcium Oxide + Water -> Calcium Hydroxide
          • CaO + H2O > Ca(OH)2
        • CALCIUM HYDROXIDE is an ALKALI
          • It can be used to NEUTRALISE acidic soil in fields as well as POWDERED LIMESTON, but works much FASTER than powdered limestone
          • It can also be used to test for CARBON DIOXIDE
            • Make a solution of CALCIUM HYDROXIDE and WATER (LIMEWATER) and bubble gas through it. The solution will turn CLOUDY if there's CARBON DIOXIDE in the gas
              • The cloudiness is caused by the formation of CALCIUM CARBONATE
                • Calcium Hydroxide + Carbon Dioxide > Calcium Carbonate + Water
                  • Ca(OH)2 + CO2 > CaCO£ + H2O
    • LIMESTONE PRODUCTS
      • CEMENT
        • POWDERED LIMESTONE is HEATED in a kiln with POWDERED CLAY to make CEMENT
      • MORTAR
        • CEMENT can be mixed with SAND and WATER to make MORTAR
      • CONCRETE
        • CEMENT can also be mixed with SAND and AGGREGATE to make CONCRETE. [AGGREGATE= WATER + GRAVEL]
    • ADVANTAGES
      • Limestone products are used to NEUTRALISE ACIDIC SOIL and ACIDITY in RIVERS and LAKES
      • It provides CHEMICALS used in making DYES, PAINTS and MEDICINE
      • QUARRYING can provide JOBS and bring more MONEY into the LOCAL ECONOMY
    • DISADVANTAGES
      • QUARRYING limestone makes HOLES, which PERMANENTLY change the LANDSCAPE
      • The Quarrying Processes can make NOISE and DUST in quiet areas
      • Quarrying DESTROYS HABITATS of animals and birds

Comments

Pr0 MaNiC

very good mind map 

San1234

very good

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