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A wetted-wall tower is used to ''aerate'' water using air at 2.0 atm total system pressure and 20°C. The molar composition of air is 21% O₂, 78% N₂, and 1% other gases. At 20°C, the Henry's law constant for dissolution of oxygen in water is 40,100 atm, and the mass density of liquid water is 1000 kg=m³

a. What is the maximum mole fraction of oxygen that could be dissolved in the water?

b. What is the maximum molar concentration of oxygen that could be dissolved in the water?

c. If the total system pressure increases, will the dissolved oxygen concentration in the water (1) increase; (2) decrease; or (3) stay the same?

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