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Chemistry Core > Limestone > Flashcards

Limestone Flashcards

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1
Q

What is limestone

A

Calcium carbonate

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2
Q

How is limestone extracted from the ground

A

Quarrying

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3
Q

What is the symbol for calcium carbonate

A

CaCO3

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4
Q

What happens when limestone is thermally decomposed

A

It produces calcium oxide and carbon dioxide

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5
Q

What is the word equation for the thermal decomposition of calcium carbonate

A

Calcium carbonate -> calcium oxide + carbon dioxide

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6
Q

What is he symbol equation for the thermal decomposition of limestone

A

CaCO3 -> CaO + Co2

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7
Q

What happens when calcium carbonate reacts with acid

A

It makes a calcium salt, carbon dioxide and water

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8
Q

What is the word equation for calcium carbonate reacting with sulfuric acid

A

Calcium carbonate + sulfuric acid -> calcium sulfate + carbon dioxide + water

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9
Q

What is the word equation for the reaction of calcium carbonate and hydrochloride acid

A

Calcium carbonate + hydrochloride acid -> calcium chloride + carbon dioxide + water

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10
Q

What is the symbol equation for the calcium carbonate and sulfuric acid reaction

A

CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O

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11
Q

What happens when calcium oxide reacts with water

A

You get calcium hydroxide

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12
Q

What is the word equation for adding water to calcium oxide

A

Calcium oxide + water -> calcium hydroxide

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13
Q

What is the symbol equation for adding water to calcium oxide

A

CaO + H2O -> Ca(OH)2

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14
Q

What can you use both calcium hydroxide and powdered limestone for

A

Neutralising acidic soil in fields

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15
Q

What is the advantage of using calcium hydroxide over powdered limestone to neutralise acidic soils in fields

A

Much faster

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16
Q

What can calcium hydroxide be used as a test for

A

Co2

17
Q

What is calcium hydroxide

A

Limewater

18
Q

How can you test for carbon dioxide

A

Bubble gas through limewater and if it turns cloudy there is carbon dioxide present

19
Q

What happens when you add carbon dioxide to calcium hydroxide

A

You get calcium carbonate and water

20
Q

What is limestone used to make

A

Cement
Mortar
Concrete

21
Q

How do you make cement for limestone

A

Add powdered limestone with powdered clay in a heated kiln

22
Q

How do you make mortar with limestone

A

Mix cement with sand and water

23
Q

How do you make concrete from limestone

A

Add sand and aggregate to cement

24
Q

Give 3 disadvantages of quarrying limestone

A

Noise pollution
Destroys the habitats of animals
Traffic and air pollution through transporting materials

25
Q

Give 3 advantages of quarrying limestone

A

Provides things people want - roads and homes
Neutralises acidic soil and lakes
Provides jobs and contributes to local economy

26
Q

What is 2 advantages of limestone products

A

They are used as building materials

Widely available and relatively cheap

27
Q

What are 2 disadvantages of the products of limestone

A

More hard wearing than marble

Unattractive as a building material

Chemistry Core (17 decks)

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