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AQA CORE CHEMISTRY > Limestone > Flashcards

Limestone Flashcards

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1
Q

How do you get limestone?

A

Quarried out of the ground

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2
Q

What is limestone good for?

A

Making into blocks for building with

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3
Q

What is the formula for calcium carbonate?

A

CaCO3

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4
Q

What are the products of thermally decomposing calcium carbonate?

A

Calcium oxide

Carbon dioxide

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5
Q

What is thermal decomposition?

A

Breaking something down using heat

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6
Q

What is the symbol equation for calcium oxide?

A

CaO

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7
Q

What is produced when calcium carbonate reacts with acid?

A

Calcium salt
Carbon dioxide
Water

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8
Q

What is produced when calcium carbonate reacts with sulfuric acid?

A

Calcium sulfate
Carbon dioxide
Water

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9
Q

What depends on the type of acid?

A

The type of salt produced

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10
Q

When calcium oxide reacts with water what is produced?

A

Calcium hydroxide

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11
Q

What is the symbol equation for calcium hydroxide?

A

Ca(OH)2

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12
Q

What is calcium hydroxide?

A

An alkali

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13
Q

What can calcium hydroxide be used to do?

A

Neutralise acidic soil

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14
Q

How can you test for Carbon dioxide?

A

Make a solution of calcium hydroxide in water
Bubble gas through it
Cloudy means there is CO2

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15
Q

What is the name for calcium hydroxide and water?

A

Limewater

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16
Q

How can you make cement?

A

Powdered limestone heated in a kiln with powdered clay

17
Q

How can you make mortar?

A

Cement mixed with sand and water

18
Q

How can you make concrete?

A

Mix cement with sand and aggregate

19
Q

What is aggregate?

A

Water and gravel

20
Q

What are the disadvantages of quarrying limestone?

A 
Destroys landscape
Noisy 
Destroys habitats 
Pollution from lorries
Waste materials produce tips
Pollution from burning fossil fuels for energy
21
Q

What are the advantages of limestone?

A

Provides things people want - houses and roads
Neutralise acidic lakes
Neutralise sulfur dioxide - cause of acid rain

22
Q

What is limestone?

A

Calcium carbonate

AQA CORE CHEMISTRY (23 decks)

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