Thermal Decomposition of Carbonates

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  • Thermal Decomposition of Carbonates
    • Limestone consists of Calcium Carbonate
      • When heated  it breaks down into Calcium Oxide and Carbon Dioxide
    • Carbon Dioxide gas produced can be tested by bubbling it through limewater
      • Reacts with carbon dioxide to produce calcium carbonate
        • Turns from clear to milky
    • Some metal carbonate decompose more easily than others
      • Less stable metal carbonates break down more quickly at lower temperatures
    • The effect of water on calcium oxide
      • Reaction between calcium oxide and water produces calcium hydroxide
        • Reaction is exothermic
      • Calcium hydroxide is an alkali
        • Can be used to neutralise farmers' soils
      • Calcium hydroxide is dissolved in water to produce limewater
    • Metal carbonates react with acids to produce CARBON DIOXIDE, A SALT AND WATER

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