The value of Henry's law constant for oxygen in water at 242C is 1.66 x 1 ox M/torr. b. c. Calculate the solubility of oxygen in water at 25aC when the total external pressure is I atm and the mole fraction of oxygen in the air IS 020. Calculate the solubility at the same temperature with the same atmospheric composition but at an increased pressure of 2 atn. What would happen to the solubility of the oxygen gas if the temperature was increased?