C1.2 Rocks and Building Materials

Question 1

What is the scientific name for limestone?

Answer 1

Calcium Carbonate

Question 2

What is the symbol for Calcium Carbonate(Limestone).

Answer 2

CaCO3

Question 3

How is Calcium Carbonate formed?

Answer 3

By ionic bonding.

Question 4

What is Thermal Decomposition?

Answer 4

Where a group 2 element is broken down due to heat.

Question 5

What is the scientific word for slaked lime?

Answer 5

Calcium Hydroxide

Question 6

Why would calcium hydroxide be of good use to farmers?

Answer 6

Farmers would use Calcium Hydroxide on their soil. This is because calcium hydroxide is an alkali and will neutralize any acidity present.

Question 7

What is acid rain?

Answer 7

Sulphuric acid.

Question 8

How is sulphuric acid produced?

Answer 8

When sulphur dioxide reacts with rain.

Question 9

What is the symbol equation for acid rain?

Answer 9

H2O + SO2 = H2SO4 (numbers are small)

Question 10

What happens when limestone is heated?

Answer 10

It gives off carbon dioxide and makes calcium oxide (quick lime)

Question 11

What happens when you add water to quick lime?

Answer 11

It makes slaked lime (calcium hydroxide)

Question 12

How is calcium hydroxide solution made?

Answer 12

When water is added to calcium hydroxide.

Question 13

How do you produce calcium carbonate from slaked lime?

Answer 13

You add carbon dioxide.

Question 14

What is mortar made of?

Answer 14

Calcium hydroxide
Sand
Water

Question 15

What’s cement made of?

Answer 15

Calcium carbonate

Clay

Question 16

What is concrete made of?

Answer 16

Calcium carbonate
Clay
Sand
Aggregate (stones)

Question 17

hydrogen + oxygen =?

Answer 17

hydrogen oxide or water vapour

Question 18

what is hydration?

Answer 18

reaction with water/steam

Question 19

why is iron used to displace copper?

Answer 19

more reactive

it’s cheaper

Question 20

how could butene be separated from the other hydrocarbons?

Answer 20

fractional distillation