Limestone and building materials Flashcards
What can you use calcium oxide for?
Neutralise acidic lakes and soils
What happens to the strength of concrete the more sand you add
More sand the weaker the concrete
Name 3 advantages of quarrying limestone
- creates jobs
- makes money for economy
- gives people jobs
- is restored after
- gives is valuable limestone
What is the test for CO2
Limewater
Goes from clear to cloudy
What is thermal decomposition?
The breaking down of substances using heat
What is the symbol equation for calcium hydroxide
CO(OH)2
What is the chemical name for CO(OH)2
Calcium hydroxide
What is the chemical name for CaO
Calcium oxide
What is the symbol equation for calcium carbonate
CaCO3
What is the chemical name for limestone
Calcium carbonate
Name 3 disadvantages of quarrying limestone
- noisy
- messy
- destroys habitats
- increases traffic
- destroys areas of natural beauty
What do you get when you heat calcium carbonate
Calcium oxide and carbon dioxide
What are the four stages of the limestone cycle
in order
1) limestone (Calcium carbonate) 2) quick lime (Calcium oxide) 3) slaked lime (Calcium hydroxide) 4) limewater (Calcium hydroxide solution)
What is the symbol equation for calcium oxide
CaO3
What is the symbol equation for slaked lime
Ca(OH)2
What is the symbol equation for limewater
CA(OH)2
What do you get when you add a little bit a water to calcium oxide
Calcium hydroxide
What do you get when you add water to calcium hydroxide
Calcium hydroxide solution
What do you get when you add carbon dioxide to calcium hydroxide solution
Calcium carbonate
What is the generic name for calcium carbonate
Limestone
What is the generic name for calcium oxide
Quick lime
What is the generic name for calcium hydroxide
Slaked lime
What is the generic name for calcium hydroxide solution
Lime water
How do you make cement?
Powdered limestone is heated up with powdered clay
