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Chemistry 1 > 50-51 - Limestone > Flashcards

50-51 - Limestone Flashcards

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1
Q

What is the symbol for calcium carbonate?

A

CaCO3

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2
Q

How is limestone gathered?

A

It is quarried from the ground

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3
Q

What happens when limestone is heated?

A

Calcium oxide and carbon dioxide are produced

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4
Q

Thermal decomposition:

CaCO3 -> ___ + ___

A

CaO + CO2

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5
Q

Thermal decomposition:

MgCO3 -> ___ + ___

A

MgO + CO2

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6
Q

What happens when calcium carbonate reacts with acid?

A

Produces calcium salt, CO2, and water

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7
Q

Calcium carbonate + sulfuric acid -> ___ + ___ + ___

A

Calcium sulfate + carbon dioxide + water

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8
Q

Name two carbonates that react with acids

A

Magnesium, calcium, copper, zinc and sodium

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9
Q

How is calcium hydroxide produced?

A

When calcium oxide reacts with water

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10
Q

What is the symbol for calcium hydroxide?

A

Ca(OH)2

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11
Q

What can calcium hydroxide be used for?

A

To neutralise acidic lakes and soils

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12
Q

What is limewater?

A

The solution of calcium hydroxide in water

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13
Q

What is the CO2 test?

A

Limewater turning from clear to cloudy

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14
Q

What causes the cloudiness in the carbon dioxide test?

A

The formation of calcium carbonate

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15
Q

What can be made from limestone?

A

Cement

Mortar

Concrete

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16
Q

Name three disadvantages of quarrying limestone

A

The landscape looks ugly

Noise

Dust

Destroyed habitats

Pollution due to transportation

17
Q

Name three advantages of quarrying limestone

A

Essential for building houses/roads

Can neutralise acidic soils

Sulfur dioxide can be neutralised in chimneys before acid rain

Jobs are provided

Economic benefit leads to local improvements

Restoration and landscaping does later take place

18
Q

What is the chemical name for limestone?

A

Calcium carbonate

19
Q

What are four advantages of limestone products?

A

Limestone is abundant

Cheap

Easy to cut

Hard wearing but still attractive

Can be moulded

Doesn’t rot or corrode

Not affected by insects/rodents

20
Q

What is cement?

A

Powdered limestone heated with powdered clay

21
Q

What is mortar?

A

Cement, sand, and water

Used to stick bricks together

22
Q

What is concrete?

A

Cement, sand, and aggregate

Chemistry 1 (13 decks)

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