C1.2 Limestone and Building Materials

Question 1

What compound is limestone mainly composed of?

Answer 1

Calcium Carbonate (CaCO3)

Question 2

What products are made through the thermal decomposition of Calcium Carbonate?

Answer 2

Calcium Oxide and Carbon Dioxide

Question 3

Other metal carbonates also decompose to make

Answer 3

Carbon Dioxide and a metal oxide

Question 4

What does Calcium Oxide react with water to form?

Answer 4

Calcium hydroxide, an alkali which can be used in the neutralisation of acids. For example, it is used to neutralise acidic soil in fields

Question 5

What is another name for Calcium Oxide?

Answer 5

Quicklime

Question 6

What is another name for Calcium Hydroxide?

Answer 6

Slaked Lime

Question 7

What is the name of the solution of calcium hydroxide in water?

Answer 7

Limewater

Question 8

What does Calcium Hydroxide react with Carbon Dioxide to produce?

Answer 8

Calcium Carbonate

Question 9

What can limewater be used to test for?

Answer 9

Carbon Dioxide

Question 10

Carbonates react with acid to form what?

Answer 10

Carbon Dioxide, a salt and water

Question 11

Other carbonates that react with acid are

Answer 11

Magnesium, Copper, Zinc and Sodium

Question 12

Limestone is damaged by

Answer 12

Acid rain

Question 13

When limestone is heated with clay it forms

Answer 13

Cement

Question 14

When cement is mixed with sand it forms

Answer 14

Mortar

Question 15

When cement is mixed with sand and aggregate it forms

Answer 15

Concrete

Question 16

Limestone is great for making

Answer 16

Buildings

Question 17

Disadvantages of Quarrying Limestone:

Answer 17

1. It creates huge ugly holes (eyesore) and permanently changes the landscape
2. Makes lots of noise and dust
3. Destroys habitats
4. Transportation causes more noise and pollution
5. Waste materials produce tips which are an eyesore

Question 18

Cement factories make a lot of

Answer 18

Dust, which can cause breathing problems for some

Question 19

Energy needed to produce cement and quicklime most likely comes from

Answer 19

Burning fossil fuels, which causes pollution

Question 20

Products of Limestone:

Answer 20

1. Houses and roads
2. Chemicals in Dyes, paints and medicines
3. Neutralise acidic soil, lakes and rivers

Question 21

Advantages of Limestone Quarrying:

Answer 21

1. Creates jobs

2. After quarrying, landscaping and restoration is normally required.

Question 22

Advantages of Limestone and its products:

Answer 22

1. Widely available
2. Cheaper than other materials
3. Hard-wearing
4. Limestone is attractive
5. Doesn’t rot
6. Fire resistant
7. Concrete doesn’t corrode

Question 23

Disadvantages of Limestone and its products:

Answer 23

1. Concrete is unattractive
2. Concrete has a low tensile strength
3. Concrete can crack