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 =10-10.33.
2) How about the pH of water that is in equilibrium with 2 atm pure CO2(g)?
Please show the equations and process of your calculation as well.