Rocks and building materials

Limestone and its uses

limestone has many uses eg calcium oxide and cement

concrete is made with sand, aggregate and water

limstone is mainly calcium carbonate, CaCO3

when heated calcium carbonate decomposes to make calcium oxide and carbon dioxide, equation: calcium carobonate - calcium oxide + carbon dioxide

this is called thermal decompostion

Reaction of carbonates

metal carbonates all react in a similar way when heated or when reacted with acids

metal carbonates decompose to the metal oxide and carbon dioxide when heated

all carbonates react with acids to produce salt, water and carbon dioxide gas

calcium hydorxide is called limewater, it…