Limestone Flashcards
How do you get limestone?
Quarried out of the ground
What is limestone good for?
Making into blocks for building with
What is the formula for calcium carbonate?
CaCO3
What are the products of thermally decomposing calcium carbonate?
Calcium oxide
Carbon dioxide
What is thermal decomposition?
Breaking something down using heat
What is the symbol equation for calcium oxide?
CaO
What is produced when calcium carbonate reacts with acid?
Calcium salt
Carbon dioxide
Water
What is produced when calcium carbonate reacts with sulfuric acid?
Calcium sulfate
Carbon dioxide
Water
What depends on the type of acid?
The type of salt produced
When calcium oxide reacts with water what is produced?
Calcium hydroxide
What is the symbol equation for calcium hydroxide?
Ca(OH)2
What is calcium hydroxide?
An alkali
What can calcium hydroxide be used to do?
Neutralise acidic soil
How can you test for Carbon dioxide?
Make a solution of calcium hydroxide in water
Bubble gas through it
Cloudy means there is CO2
What is the name for calcium hydroxide and water?
Limewater
How can you make cement?
Powdered limestone heated in a kiln with powdered clay
How can you make mortar?
Cement mixed with sand and water
How can you make concrete?
Mix cement with sand and aggregate
What is aggregate?
Water and gravel
What are the disadvantages of quarrying limestone?
Destroys landscape Noisy Destroys habitats Pollution from lorries Waste materials produce tips Pollution from burning fossil fuels for energy
What are the advantages of limestone?
Provides things people want - houses and roads
Neutralise acidic lakes
Neutralise sulfur dioxide - cause of acid rain
What is limestone?
Calcium carbonate
