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AQA CORE CHEMISTRY > Limestone > Flashcards

Limestone Flashcards

1
Q

What is Limestone used for?

A

Made into blocks for building

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2
Q

What is produced when calcium carbonate is thermally decomposed?

A

Calcium oxide

Carbon dioxide

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3
Q

What is thermal decomposition?

A

Breaks something down

Using heat

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4
Q

What is Limestone?

A

Calcium Carbonate

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5
Q

What is calcium carbonate?

A

CaCO3

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6
Q

What happens to calcium carbonate when it is heated?

A

It thermally decomposes to make calcium oxide and carbon dioxide

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7
Q

What is produced when calcium carbonate reacts with sulfuric acid?

A

Calcium sulfate
Carbon dioxide
Water

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8
Q

What is produced when calcium oxide is added to water?

A

Calcium hydroxide

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9
Q

What is calcium hydroxide?

A

Alkali

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10
Q

What can calcium hydroxide be used for?

A

Neutralise acidic soil faster than limestone

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11
Q

What can calcium hydroxide be used to test for?

A

Carbon dioxide

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12
Q

What is the test for carbon dioxide?

A

Make solution of calcium hydroxide in water
Bubble gas through it
If the solution goes cloudy there is carbon dioxide

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13
Q

How is cloudiness caused in the test for carbon dioxide?

A

By the formation of calcium carbonate

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14
Q

How can you make cement?

A

Powdered limestone heated in a kiln with powdered clay

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15
Q

How can mortar be made?

A

Cement mixed with sand and water

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16
Q

What is mortar?

A

Stuff you stick bricks together with

17
Q

How can you make concrete?

A

Mix cement with sand and aggregate

18
Q

What is aggregate?

A

Water and gravel

AQA CORE CHEMISTRY (13 decks)

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