Limestone

Question 1

What is limestone

Answer 1

Calcium carbonate

Question 2

How is limestone extracted from the ground

Answer 2

Quarrying

Question 3

What is the symbol for calcium carbonate

Answer 3

CaCO3

Question 4

What happens when limestone is thermally decomposed

Answer 4

It produces calcium oxide and carbon dioxide

Question 5

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

Answer 5

Calcium carbonate -> calcium oxide + carbon dioxide

Question 6

What is he symbol equation for the thermal decomposition of limestone

Answer 6

CaCO3 -> CaO + Co2

Question 7

What happens when calcium carbonate reacts with acid

Answer 7

It makes a calcium salt, carbon dioxide and water

Question 8

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

Answer 8

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

Question 9

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

Answer 9

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

Question 10

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

Answer 10

CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O

Question 11

What happens when calcium oxide reacts with water

Answer 11

You get calcium hydroxide

Question 12

What is the word equation for adding water to calcium oxide

Answer 12

Calcium oxide + water -> calcium hydroxide

Question 13

What is the symbol equation for adding water to calcium oxide

Answer 13

CaO + H2O -> Ca(OH)2

Question 14

What can you use both calcium hydroxide and powdered limestone for

Answer 14

Neutralising acidic soil in fields

Question 15

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

Answer 15

Much faster

Question 16

What can calcium hydroxide be used as a test for

Answer 16

Co2

Question 17

What is calcium hydroxide

Answer 17

Limewater

Question 18

How can you test for carbon dioxide

Answer 18

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

Question 19

What happens when you add carbon dioxide to calcium hydroxide

Answer 19

You get calcium carbonate and water

Question 20

What is limestone used to make

Answer 20

Cement
Mortar
Concrete

Question 21

How do you make cement for limestone

Answer 21

Add powdered limestone with powdered clay in a heated kiln

Question 22

How do you make mortar with limestone

Answer 22

Mix cement with sand and water

Question 23

How do you make concrete from limestone

Answer 23

Add sand and aggregate to cement

Question 24

Give 3 disadvantages of quarrying limestone

Answer 24

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

Question 25

Give 3 advantages of quarrying limestone

Answer 25

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

Question 26

What is 2 advantages of limestone products

Answer 26

They are used as building materials | Widely available and relatively cheap

Question 27

What are 2 disadvantages of the products of limestone

Answer 27

More hard wearing than marble | Unattractive as a building material