1) If the water is in equilibrium with the CO 2 (g) in atmosphere, what is the pH of the water?

1) If the water is in equilibrium with the CO2(g) in atmosphere, what is the pH of the water? Given: Henry's constant KH = 10-1.46 (M/atm). Partial pressure of CO2(g) in atmosphere is 10-3.5 atm. For carbonate system, Ka1=10-6.35, Ka2