Chemistry unit 1- rocks and building materials

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  • Limestone is useful for building because it can make calcium oxide and cement
  • Limestone is mainly calcium carbonate (CaCO3)
  • When heated strongly calcium carbonate decomposes to form carbon dioxide and calcium oxide- this is done in industry using kilns as they get to extremely high temperatures (THERMAL DECOMPOSITION)
  • ALL metal carbonates decompose to form a metal oxide and carbon dioxide
  • ALL carbonates react with acid to produce a salt, water and co2
  • limestone damaged by acid rain because the calcium carbonate reacts with

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