Using Limestone

Question 1

What is the process of heating limestone called?

What does it produce?

Answer 1

Thermal decomposition

Calcium oxide and carbon dioxide

Question 2

What is thermal decomposition?

Equation for limestone:

Answer 2

When one substance chemically changes into at least two new substances when heated.

CaCO3 -> CaO + CaO2

Question 3

Calcium oxide reacts with water to produce what?

Hint: Ca(OH)2

Answer 3

Calcium hydroxide

Question 4

What is limestone used to make?

Answer 4

When powdered heated in a kiln with clay to make cement.

Cement mixed with sand and water to make mortar.

Cement mixed with sand and aggregate to make concrete.

Question 5

Quarrying limestone makes a right mess of the landscape:

Answer 5

Huge ugly holes
Noise and dust
Destroys habitats
Transported away

Question 6

Making stuff from limestone causes pollution too:

Answer 6

Factories create a lot of dust, breathing problems.

Energy comes from burning fossil fuels, pollution.

Question 7

Provides things people want:

Answer 7

Roads
Dyes, paints, medicines
Neutralise acidic soil
Jobs

Question 8

Limestone advantages and disadvantages:

Answer 8

A
Widely available, cheap
Hard wearing, attractive 
Very quick
Don't rot, Insects and rodents can't get to it
Fire resistant 
D 
Concrete unattractive 
Low tensile strength

Question 9

Limestone is mainly what?

Hint: CaCO3

Answer 9

Calcium carbonate