1.2 (P1) Limestone Flashcards
What is limestone?
A naturally occurring resource
What is the chemical name and symbol for limestone?
Calcium Carbonate
CaCO3
How do you obtain limestone?
It has to be quarried
What kind of rock is limestone?
Sedimentary
How is sedimentary rock formed?
The remains of dead sea creatures
What is the first stage in the limestone reaction cycle?
Thermal decomposition
What is thermal decomposition?
Breaking down by heat
What is thermal decomposition performed in?
Lime Kilns
What is another name for calcium oxide?
Quick lime
What is a bi product of the first stage of the limestone reaction cycle?
Carbon dioxide
After thermal decomposition what does calcium carbonate turn into?
Calcium oxide
And
Carbon dioxide
What is the second stage in the limestone reaction cycle?
Add a few drops of water
What does calcium oxide turn into after the second stage of the limestone reaction cycle?
Calcium hydroxide (solid)
What is another name for calcium hydroxide?
Slaked lime
What is calcium hydroxide used for?
It is an alkali so neutralise acids
Eg
In agriculture on acidic soil
In industry to neutralise acidic gases
Is calcium hydroxide very soluble in water?
No
Do metal carbonates react in similar ways?
Yes
When heated strongly enough what do metal carbonates decompose to?
A metal oxide
And
Carbon dioxide
How do we know if CO2 is present?
It turns limewater cloudy
What two carbonates can a Bunsen burner not get hot enough to decompose?
Sodium or Potassium
What do carbonates react with acids to produce?
A salt, water and carbon dioxide
What is limestone damaged by?
Acid rain
What is the third stage of the limestone reaction cycle?
Add more water
What does calcium hydroxide turn into after the third stage of the limestone reaction cycle?
Calcium hydroxide
aqueous solution
