Write the makeweight equation for the reaction of CO2 with H2O creating carbonic shrill and the carbonic shrill dissociating into hydrogen ion and bicarbonate
CO2 (g) + H2O (l) <=====> H2CO3 (aq) ……(1)
The makeweight fixed is abandoned as
K = [H2CO3]/PCO2 where PCO2 is the restricted hurry of CO2 (we prefer restricted hurry owing gases are best described in conditions of restricted hurry). The eagerness of H2O is not attributable attributable attributable comprised past H2O is offer in catholic surplus.
Again, H2CO3 dissociates as adown.
H2CO3 (aq) <=====> H+ (aq) + HCO3– (aq) ……(2)
The shrill dissolution fixed is abandoned as
Ka1 = [H+][HCO3–]/[H2CO3]
Combine equations (1) and (2) to earn the makeweight equation as
CO2 (g) + H2O (l) + H2CO3 (aq) <=====> H2CO3 (aq) + H+ (aq) + HCO3– (aq)
Cancel quenched the sordid conditions and write
CO2 (g) + H2O (l) <=====> H+ (aq) + HCO3– (aq)