Suppose the total pressure in a bottle of soda water before it is opened is 35 psig and that the gas mixture is 75% CO2 and 25% other gases. The temperature is 5C. The Henrys Law constant for CO2 is 29.4 atm.L/mol.

a. If the system is in equilibrium, what is the saturated mass concentration of CO2 dissolved in the soda? (For this problem, ignore reactions between the CO2 and the water.) Answer: about 3790 mg/L

b. Calculate the new equilibrium concentration when the bottle is opened. The volumetric fraction of CO2 in the normal atmosphere is 400 ppmv. Knowing this, explain why the CO2 acts as it does when the bottle is opened. Partial answer: 0.6 mg/L