Limestone and its uses

These are chalk cliffs made from a type of limestone formed from the shells of

tiny sea plants

Built from limestone blocks

Glass is made from limestone

These pipes are made of concrete- made from cement,sand,and water

Cement is made from limestone and clay

Heating Limestone in a Kiln

Making Quicklime

• Limestone breaks down quickly when we heat it strongly to make quicklime and carbon dioxide

• The equation

• Calcium carbonate calcium oxide + carbon dioxide

• This is called ___________ ____________

Making slaked lime

• Calcium oxide + water Calcium hydroxide

• A little slaked lime dissolves in water and carbon dioxide can be blown through to form calcium carbonate which turns the limewater cloudy

• Calcium hydroxide+ carbon dioxide calcium carbonate + water

Quicklime and slaked lime

• Mortar is made by mixing slaked lime with sand and water

• Mortar holds buildings together

The limestone cycle

• I