Answer:
Carbonic acid is formed from the reaction between Carbon dioxide and Water.
H20+ CO2—> H2CO3
The Carbonic acid then undergoes a dissociation reaction to give the products:
1) hydrogen ion (H+)
2)hydrogen carbonate ion (HCO3-)
H2CO3—> H+ + HCO3-
The H+ ion formed from the dissociation is what reacts with the water and lowers the pH as a result of the increase in the power of hydrogen ions which subsequently lowers the pH of the water thereby making it acidic.
