Rocks and Building Materials C1 Unit 1

Rocks and Building Materials C1 Unit 1

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What is the formula for the main compound in limestone?
CaC03
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How is cement made?
By heating a mixture of limestone and clay in a kiln.
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Name the four substance used to make concrete?
Clay, Sand, Water and Aggregate
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Name the products formed when calcium carbonate is heated strongly?
Calcium oxide and carbon dioxide
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Write a word equation for the reaction of calcium oxide and water?
Calcium oxide + water = Calcium hydroxide
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Limewater goes cloudy when mixed with carbon dioxide. Explain why, using and equation in your answer?
Calcium carbonate is formed and is insoluble. Calcium hydroxide + carbon dioxide = calcium carbonate + water
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Explain as fully as you can, why acids damage limestone.
Acids react with calcium carbonate producing carbon dioxide and a salt. The salt dissolves in water and so the amount of limestone decreases or is worn away.
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Farmers spread calcium hydroxide on fields with acidic soils. Explain why, naming the type of reaction that takes place and the property of calcium hydroxide on which this reaction depends?
Calcium hydroxide reacts with acids, because calcium hydroxide is an alkali and the reaction is neutralisation (the pH of the soil increases, which is better for growing crops).
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Other cards in this set

Card 2

Front

How is cement made?

Back

By heating a mixture of limestone and clay in a kiln.

Card 3

Front

Name the four substance used to make concrete?

Back

Preview of the front of card 3

Card 4

Front

Name the products formed when calcium carbonate is heated strongly?

Back

Preview of the front of card 4

Card 5

Front

Write a word equation for the reaction of calcium oxide and water?

Back

Preview of the front of card 5
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