Aerated water contains

Aerated water: Chemically carbonated water is better known as carbonic acid pumping carbon gases into water composition of aerated water

$={\text{H}}_{\text{2}}\text{O}+{\text{CO}}_{\text{2}}$

${\text{H}}_{\text{2}}\text{O}+{\text{CO}}_{\text{2}}\to {\text{H}}_{\text{2}}{\text{CO}}_3$

                      Carbonic-acid.