Chemistry, 13: Carbonate

• What is the manufacture of lime (calcium oxide)?

  Limestone is heated in a lime kiln, where it is rotated and strongly heated

  The calcium carbonate absorbs the heat, and decomposes into calcium oxide
• What is the equation for the production of lime?

  CaCO3(s) → 1200 degrees celsius → CaO(s) + CO2(g)
• How is slaked lime produced?


  Adding water to the calcium oxide, causing a vigorous exothermic reaction to take place
• What is the equation for the production of slaked lime?

  CaO(s) + H2O(l) → slaked lime
• Calcium oxide (lime) can be used to treat acidic soil and industrial waste to neutralise it
• Calcium oxide is reacted with sulfur dioxide so that it doesn't mix with air to produce acid rain