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GCSE Chemistry > C1.2 Rocks and Building Materials > Flashcards

C1.2 Rocks and Building Materials Flashcards

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1
Q

What is limestone made from?

A

calcium carbonate

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2
Q

Limestone can be formed by…

A

remains of tiny animals and plants

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3
Q

what does powdered limestone and clay make?

A

cement

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4
Q

How do you make concrete?

A

cement, water, sand and crushed rock

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5
Q

calcium carbonate + heat=

A

calcium oxide+calcium carbonate

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6
Q

where does thermal decomposition take place?

A

in a rotary kiln

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7
Q

What is use of limestone?

A

building material

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8
Q

What is the test for carbon dioxide?

A

turns limewater cloudy

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9
Q

carbonate+acid=

A

salt+water+carbon dioxide

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10
Q

calcium carbonate+hydrochloric acid=

A

calcium chloride+water+carbon dioxide

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11
Q

What do metal carbonates form when thermally decomposed?

A

metal oxides and carbon dioxide

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12
Q

calcium oxide+water=

A

calcium hydroxide

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13
Q

What is the limestone cycle?

A

heat calcium carbonate, form calcium oxide, add water to form calcium hydroxide, add more water to form calcium hydroxide solution, add carbon dioxide to form calcium carbonate

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14
Q

What is calcium hydroxide used for?

A

make soils less acidic for farmers

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15
Q

what does calcium hydroxide, sand and water produce?

A

mortar

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16
Q

What is mortar used for?

A

holding bricks together

17
Q

calcium hydroxide+carbon dioxide=

A

calcium carbonate+water

18
Q

What is a disadvantage of lime mortar?

A

it doesn’t harden very quickly

19
Q

What can you do add to mortar to make it set more quickly?

A

they add small rocks and it sets to form concrete

20
Q

Disadvantages of quarrying limestone

A

destroy animal habitats, disrupt schools in the area, noise pollution, air pollution, kill crops

21
Q

Advantages to quarrying limestone

A

more jobs available, new roads, trade raw materials, more business

GCSE Chemistry (17 decks)

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