1. Limestone is mainly calcium carbonate2. Limestone can be quarried and used

as a building material. 3. It is used in the making of glass,

cement, concrete, toothpaste, bread and is used to neutralise lakes and soil

Uses of limestoneUses of limestoneUses of limestoneUses of limestone

Uses of limestone

Uses of limestoneUses of limestoneUses of limestoneUses of limestone

Uses of limestone

1. When limestone is heated in a kiln it breaks down into quicklime (calcium oxide)

2. This reaction is called thermal decomposition

3. Quicklime reacts with water to produce slaked lime (calcium hydroxide) which is used to reduce the acidity of soil

Heating limestoneHeating limestoneHeating limestoneHeating limestone

Heating limestone

Making QuicklimeMaking QuicklimeMaking QuicklimeMaking Quicklime

Making quicklime

Making QuicklimeMaking QuicklimeMaking QuicklimeMaking Quicklime

Making quicklime

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Making slaked lime

Making Slaked limeMaking Slaked limeMaking Slaked limeMaking Slaked lime

Making slaked lime

Limestone CycleLimestone CycleLimestone CycleLimestone Cycle

Making slaked lime

Limestone CycleLimestone CycleLimestone CycleLimestone Cycle

Making slaked lime

Limestone CycleLimestone CycleLimestone CycleLimestone Cycle

Making slaked lime

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Limestone – Benefits / Problems