(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.
- 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…