1.2 Limestone Flashcards Preview

GCSE Chemistry 11L1 > 1.2 Limestone > Flashcards

Flashcards in 1.2 Limestone Deck (34)
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0

What is the chemical formula for calcium carbonate?

CaCO3

1

Is calcium carbonate a compound or mixture?

It is a compound

2

What does calcium carbonate break down into through thermal decomposition?

Calcium oxide and carbon dioxide

3

What is used to make cement?

Clay and powder limestone

4

What is used to make mortar?

Cement, sand and water

5

What happens to lime water when carbon dioxide is present?

It turns cloudy

6

Calcium oxide reacts with water to produce what?

Calcium hydroxide

7

Calcium carbonate breaks down when heated what is this called called?

Thermal decomposition

8

What colour is calcium oxide when hot?

Yellow

9

What colour is calcium oxide when cold?

White

10

How do you produce calcium oxide from calcium carbonate?

Heating it

11

What is the formula for calcium oxide plus water.

CaO+H2O->Ca(OH)2

12

What is a benefit of a lime stone quarry?

Local employment

13

Limestone is mostly made of what?

Calcium carbonate

14

An advantage of using concrete for building foundations.

It is strong when squashed.

15

Limestone is mostly made of what?

Calcium Carbonate

16

What is mixed with Limestone and Sodium carbonate to create glass?

Sand

17

What type of rock is Limestone?

Sedimentary

18

How does limewater convert into limestone?

Carbon dioxide is bubbled through it

19

What compound dissolves in water to form lime water?

Calcium hydroxide

20

Cement is powdered limestone and what?

Sand and water

21

If carbon dioxide is present, what does the lime water do?

Goes cloudy ☁️☁️☁️

22

What does limestone under go when heated?

Thermal Decomposition

23

When limestone reacts with an acid what is produced?

Water, Carbon Dioxide & a salt

24

What gas is added to limewater to make limestone?

Carbon Dioxide

25

What is the chemical symbol for lime water?

Ca(OH) (Aq)
2

26

What is an economic impact of quarrying for Limestone?

New jobs and more money

27

Andy says "Acid rain doesn't damage limestone". Is andy correct or wrong

Andy is wrong

28

Cement is used to make concrete, but what else is?

sand, water & powdered rock aggregate

29

When Limestone is heated you get a new substance and a gas, write out the chemical symbols for both of these.

CaO + CO
2