C1.2

Question	Answer
What is limestone mainly composed of?	Calcium Carbonate (CaCO3)
Where is limestone found and what can it be used for?	It is quarried and it can be used as a building material
How can calcium carbonate be decomposed and what does it produce?	Through thermal decomposition. It produces calcium oxide and carbon dioxide
What 5 carbonates of metals decompose in a similar way? What basic products are produced?	Magnesium, sodium, zinc, copper and calcium. Metal oxide and carbon dioxide
When calcium oxide reacts with water what does it produce?	Calcium hydroxide
What is calcium hydroxide and what can it be used for?	It is an alkali and can be used in the neutralisation of acids
Why is limewater (a solution of calcium hydroxide in water) used to test for carbon dioxide?	Because it reacts with the carbon dioxide to produce calcium carbonate and turns the water cloudy.
Why is limestone damaged by acid rain? What is produced?	Because carbonates react with acids. Carbon dioxide, a salt and water is produced.
How is cement made?	Limestone is heated with clay
How is mortar and concrete made?	Mortar: Cement is mixed with sand Concrete: Cement is mixed with sand and aggregate

Resource summary

	Created by happyhats over 10 years ago