Limestone and building materials

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  • Limestone and Building Materials
    • Limestone/ Calcium carbonate (CaCO3)
      • Adding heat gives you calcium oxide (CaO)
        •  Add water to produce calcium hydroxide (Ca(OH)2)
          • This is an alkali that can be used in the neutralization of acids
            • Add more water to get calcium hydroxide solution (Ca(OH)2)(aq)
              • Add carbon dioxide to get calcium carbonate
                • Limestone/ Calcium carbonate (CaCO3)
                  • Adding heat gives you calcium oxide (CaO)
                    •  Add water to produce calcium hydroxide (Ca(OH)2)
                      • This is an alkali that can be used in the neutralization of acids
                        • Add more water to get calcium hydroxide solution (Ca(OH)2)(aq)
                          • Add carbon dioxide to get calcium carbonate
      • Thermal decomposition- Breaking down a substance with heat
        • Calcium carbonate thermally decomposes into calcium oxide and carbon dioxide
        • Metal carbonates thermally decompose to make a metal oxide and carbon dioxide
          • eg the carbonates of magnesium, copper, zinc, calcium and sodium
      • Limewater is used as a test for carbon dioxide. Carbon dioxide turns limewater cloudy
      • Carbonates react with acids to produce carbon dioxide, a salt and water.
      • Limestone is damaged by acid rain. (sulfur dioxide and nitrogen oxides) 
      • Limestone + clay + heat = cement
        • Cement + sand = mortar
          • Cement + sand + aggregate (small rocks) = concrete

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