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7 Cards in this Set
- Front
- Back
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What is the main compound formula in limestone? |
CaCO3 |
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How is cement made? |
By heating a mixture of limestone and clay in a kiln |
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What four substances are used to make concrete? |
Cement Sand Water Aggregate |
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What is meant by the term 'thermal decomposition'? |
The breaking down of a compound using heat |
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What products are formed when calcium carbonate is heated strongly? |
Calcium oxide and carbon dioxide |
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Why does limewater goes cloudy when carbon dioxide is present? |
Because calcium carbonate is formed which is insoluble.
Ca(OH)2 + CO2 >> CaCO3 + H2O |
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Why do acids damage limestone? |
Acids react with calcium carbonate producing carbon dioxide and a salt. The salt then dissolves in water so the limestone is worn away. |
