AQA Chemistry 1 C1.2 2.0 / 5 based on 1 rating ? ChemistryGCSEAQA Created by: ChloeCreated on: 06-06-13 19:44 Calcium Carbonate Limestone is mainly made up of the compound calcium carbonate (CaCO3), which is quarried and often used as a building material. When you heat calcium carbonate, it becomes Calcium oxide and releases carbon dioxide. This is thermal decomposition. React calcium oxide with water and you get calcium hydroxide. By adding more water and filtering, you get calcium hydroxide solution (limewater). By adding Carbon dioxide with this mixture, you get back to calcium carbobate. Limestone is damaged easily by acid rain caused by sulphur dioxide. Limestone can be heated with clay to create cement which can be mixed with sand to make mortar or sand and gravel to make concrete. 1 of 1
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