What is the symbol equation for calcium carbonate reacting with acid to make calcium salt, carbon dioxide and water?
CaC03 + H2S04 ------> CaSO4 + CO2 + H20
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When you add water to calcium oxide what do you get?
Calcium Hydroxide
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What is the word equation for when you add water to calcium oxide?
calcium oxide + water -------> calcium hydroxide
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What is the symbol equation for when you add water to calcium oxide?
CaO +H20 -----> Ca(OH)2
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Is calcium hydroxide an alkali or acidic?
An alkali
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What can calcium hydroxide be used to do?
Neutralise acidic soil in fields.
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What else can be used to neutralise acidic soil in fields?
Powdered limestone
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What is the advantage of using calcium hydroxide to neutralise acidic soil in fields?
It works much faster
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What is calcium hydroxide also used for?
To test for carbon dioxide
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Explain how to test for carbon dioxide
Make a solution of calcium hydroxide in water (called limewater) and bubble gas through it, the solution will turn cloudy if there's carbon dioxide in the gas.
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What is the cloudiness caused by?
The formation of calcium carbonate
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What is the word equation for the test for carbon dioxide?
calcium hydroxide + carbon dioxide -----> calcium carbonate + water
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What is the symbol equation for the test for carbon dioxide?
Ca(OH)2 + C02 ----> CaCO3 + H20
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How do you make cement?
Powdered limestone is heated in a kiln with powdered clay
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How do you make mortar?
Cement is mixed with sand and water. You can also *** calcium hydroxide to mortar
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How do you make cement?
Mix cement with sand and aggregte (water and gravel)
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Other cards in this set
Card 2
Front
How do we get limestone?
Back
It is quarried out of the ground
Card 3
Front
What is the symbol for calcium carbonate?
Back
Card 4
Front
When limestone is heated it ........ ........... to make ....... ....... and .......... ........
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