Limestone

Question 1

Limestone can be used as a building material in itself or to make which building materials?

Answer 1

Concrete or cement.

Question 2

Limestone is mainly composed of which substance?

Answer 2

CaCO3 or Calcium Carbonate.

Question 3

Calcium Carbonate can be thermally decomposed to make which substances?

Answer 3

Calcium Oxide and Carbon Dioxide.

Question 4

Carbonates of which substances can decompose in the same way to calcium?

Answer 4

Copper, Zinc and Sodium.

Question 5

Calcium oxide reacts with water to make what alkali?

Answer 5

Calcium Hydroxide.

Question 6

Alkalis can be used to neutralise what?

Answer 6

Acids.

Question 7

If more water is added to Calcium Hydroxide what solution is formed?

Answer 7

Ca(OH)2 (aq) or Calcium Hydroxide solution.

Question 8

Limestone can be damaged by what type of rain?

Answer 8

Acid rain.

Question 9

Limewater can be used as a test for Carbon Dioxide. How?

Answer 9

Bubble the gas through Calcium Hydroxide solution and if it goes cloudy white (a white precipitate forms), then Carbon Dioxide is present.

Question 10

Carbonates react with acids to make which 3 products?

Answer 10

Carbon Dioxide, a salt and water.

Question 11

Limestone can be heated with what to make cement?

Answer 11

Clay.

Question 12

Cement is mixed with sand to make…

Answer 12

…mortar.

Question 13

Cement is mixed with sand and aggregate to make…

Answer 13

…concrete.