Reactions occur when atoms combine or separate from other atoms. In the process new products with different chemical properties are formed.
Chemical reactions can be represented by chemical equations. The starting atoms or compounds are usually put on the left-hand side of the equation and the products on the right-hand side.
- H2O + CO2 gives H2CO3
- or H2O + CO2 = H2CO3
- Water + Carbon dioxide gives Carbonic acid