HideShow resource information
  • Created by: Angharad
  • Created on: 14-06-11 19:26

(words in red are important and you will need to know for the exam)

Limestone is mainly calcium carbonate - CaCO3

When heated limestone breaks down..

calcium carbonate - calcium oxide + carbon dioxide

Limestone -  (heat) - Quicklime + carbon dioxide 

Quicklime reacts with water forming calcium hydroxide (slaked lime)

slaked lime = Ca(OH)2 ... H20 + CaO 

Limewater turns cloudy white when carbon dioxide is bubbled through it.


  • Mortar
  • Cement
  • Concrete
  • Glass
  • Neutrilise acid in lakes and soil
  • Ingredient in toothpaste
  • Purify Iron 

Thermal decompostion: breaking down using heat

Metal carbonate breaks down when heated e.g

CaCO3 - CaO + CO2


Metals are from the earths crust, extracting metals depends on their place in the reactivity series if they're less reactive than carbon they can be extracted by reduction


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all The limestone cycle resources »