C1.2 Rocks and Building Materials Flashcards Preview

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

Flashcards in C1.2 Rocks and Building Materials Deck (21):
1

What is limestone made from?

calcium carbonate

2

Limestone can be formed by...

remains of tiny animals and plants

3

what does powdered limestone and clay make?

cement

4

How do you make concrete?

cement, water, sand and crushed rock

5

calcium carbonate + heat=

calcium oxide+calcium carbonate

6

where does thermal decomposition take place?

in a rotary kiln

7

What is use of limestone?

building material

8

What is the test for carbon dioxide?

turns limewater cloudy

9

carbonate+acid=

salt+water+carbon dioxide

10

calcium carbonate+hydrochloric acid=

calcium chloride+water+carbon dioxide

11

What do metal carbonates form when thermally decomposed?

metal oxides and carbon dioxide

12

calcium oxide+water=

calcium hydroxide

13

What is the limestone cycle?

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

14

What is calcium hydroxide used for?

make soils less acidic for farmers

15

what does calcium hydroxide, sand and water produce?

mortar

16

What is mortar used for?

holding bricks together

17

calcium hydroxide+carbon dioxide=

calcium carbonate+water

18

What is a disadvantage of lime mortar?

it doesn't harden very quickly

19

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

they add small rocks and it sets to form concrete

20

Disadvantages of quarrying limestone

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

21

Advantages to quarrying limestone

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