50-51 - Limestone Flashcards
What is the symbol for calcium carbonate?
CaCO3
How is limestone gathered?
It is quarried from the ground
What happens when limestone is heated?
Calcium oxide and carbon dioxide are produced
Thermal decomposition:
CaCO3 -> ___ + ___
CaO + CO2
Thermal decomposition:
MgCO3 -> ___ + ___
MgO + CO2
What happens when calcium carbonate reacts with acid?
Produces calcium salt, CO2, and water
Calcium carbonate + sulfuric acid -> ___ + ___ + ___
Calcium sulfate + carbon dioxide + water
Name two carbonates that react with acids
Magnesium, calcium, copper, zinc and sodium
How is calcium hydroxide produced?
When calcium oxide reacts with water
What is the symbol for calcium hydroxide?
Ca(OH)2
What can calcium hydroxide be used for?
To neutralise acidic lakes and soils
What is limewater?
The solution of calcium hydroxide in water
What is the CO2 test?
Limewater turning from clear to cloudy
What causes the cloudiness in the carbon dioxide test?
The formation of calcium carbonate
What can be made from limestone?
Cement
Mortar
Concrete