Chemistry 1.2 mindmap

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  • Created by: ajwhitlam
  • Created on: 04-10-15 19:48
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  • Chemistry 1.2
    • Composition
      • Composed of calcium, carbon and oxygen.
        • CaCO3
    • Uses and Issues regarding limestone.
        • Cement based materials
          • Made from limestone heated with clay in a kiln.
          • Then can be mixed with sand to make mortar
          • Also can be mixed with sand and aggregate to make concrete.
            • Concrete is stronger than mortar.
              • Then can be mixed with sand to make mortar
        • Limewater can be used as a test for carbon dioxide.
          • Insoluble calcium carbonate will form if CO2 is passed through it and the water will turn cloudy.
            • Equation
              • CO2 + Ca(OH)2 -> CaCO3 + H2O
      • Quarrying
        • Advantages
          • Quarries to mine out limestone provide jobs, boost money in the area, leading to better facilities.
          • Roads will be improved in the local area to accommodate for the quarry's trucks.
        • Disadvantages
          • Quarries can be an eyesore.
          • Quarries can pollute the surrounding area.
          • More traffic on the roads.
          • Added noise from blasting.
    • Forms of Limestone
      • Quicklime (Calcium oxide)
        • Equations
          • CaCO3 -> CaO + CO2
          • Calcium carbonate -> carbon oxide +carbon dioxide
        • Created by thermal decomp-osition of limestone
          • (By heating)
        • Reacted with water to create...
          • Slacked lime (Calcium hydroixide)
            • Also known as 'limewater'
            • Equations
              • CaO + H2O   -> Ca(OH)2
              • Calcium oxide + water -> calcium hydroxide
            • Compound = Ca(OH)2
              • 2 OH molecules joined with 1 Ca atom.
                • Limewater can be used as a test for carbon dioxide.
                  • Insoluble calcium carbonate will form if CO2 is passed through it and the water will turn cloudy.
                    • Equation
                      • CO2 + Ca(OH)2 -> CaCO3 + H2O
      • Slacked lime (Calcium hydroixide)
        • Also known as 'limewater'
        • Equations
          • CaO + H2O   -> Ca(OH)2
          • Calcium oxide + water -> calcium hydroxide
        • Compound = Ca(OH)2
          • 2 OH molecules joined with 1 Ca atom.
        • Cement based materials
          • Made from limestone heated with clay in a kiln.
          • Also can be mixed with sand and aggregate to make concrete.
            • Concrete is stronger than mortar.

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