Chemistry Unit 1 #2

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What is Limestone?
mainly calcium carbonate, CaCO3
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Calcium carbonate breaks down when heated strongly, what is this process called?
Thermal Decompostition
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What is the equation for thermal decompostition?
CaCO3>CaO+CO2
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What other elements decompose in the same way as calcium carbonate?
Magnesium, copper, zinc and sodium carbonates
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Calcium oxides reacts with___to make____?
Reacts with water to make calcium hydroxide
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Describe the experiment used to test for carbon dioxide
Solution of calcium hydroxide (limewater) bubble a gas through it and if it goes cloudy carbon dioxide is present
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How can limestone be used to make cement?
It needs to be powdered heated in a kiln with powdered clay
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How is cement used to make mortars?
Mixed with sand and clay can also add calcium hydroxide
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How do you make concrete
Mix cement sand and aggregate ( which is water and gravel)
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Name 3 environmental problems quarrying limestone causes?
Noise, destroys habitats, air pollution, unsightly tips
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Name 4 uses if limestone?
Houses, roads, dyes, neutralise acidic soil, neutralise sulphur dioxide
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Advantages of limestone x3
Widely available, cheap, hardwearing,
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Other cards in this set

Card 2

Front

Calcium carbonate breaks down when heated strongly, what is this process called?

Back

Thermal Decompostition

Card 3

Front

What is the equation for thermal decompostition?

Back

Preview of the front of card 3

Card 4

Front

What other elements decompose in the same way as calcium carbonate?

Back

Preview of the front of card 4

Card 5

Front

Calcium oxides reacts with___to make____?

Back

Preview of the front of card 5
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