C1.2 Limestone and Building materials

Question 1

What is scientific name and formula for limestone?

Answer 1

Calcium Carbonate CaCO3

Question 2

What is produced when a carbonate reacts with an acid?

Answer 2

Carbon dioxide, salt and water

Question 3

What is thermal decomposition?

Answer 3

Breaking down of a substance using heat

Question 4

What is the word and symbol equation for the thermal decomposition of limestone?

Answer 4

Calcium carbonate → calcium oxide + carbon dioxide CaCO3 → CaO + CO2

Question 5

What is the limestone reaction cycle?

Answer 5

Calcium Carbonate → (heat)→ Calcium Oxide→ add water→ Calcium Hydroxide→ more water and filter→ alcium hydroxide solution→ add CO2→ Calcium Carbonate

Question 6

What is cement?

Answer 6

Heat limestone in kiln and and add clay

Question 7

What is concrete?

Answer 7

Made from cement, sand and aggregate (water and gravel)

Very strong

Question 8

What are the benfits of limestone quarrying?

Answer 8

>jobs created

>new road links

>supply limestone for industry

>after use quarry can be used as resevoir, or leisure activities

Question 9

What are the drawbacks of limestone quarrying?

Answer 9

>uses dangerous explosives

>scars the landscape

>desttroys habitats

>noise disturbs residents and animals