Question

8) (15 points) Determine the equilibrium concentration of oxygen and carbon dioxide in the aqueous phase of a covered activated sludge tank (this is basically a tank of water with

pure oxygen being injected into the water through bubblers at the bottom of the tank – we will learn more about this process later this semester). The composition of the gas in equilibrium with the wastewater is 80% oxygen, 15% nitrogen, and 5% carbon dioxide. The gas is maintained at a total pressure of 3 atm. Neglect any potential reactions in the aqueous phase,assume that Henry's law holds, express your answer in mg/L, and use the following Henry'slaw constants: K_{H}\left(O_{2}\right)=1.26 \times 10^{-3} \mathrm{~mol} * \mathrm{~L}^{-1} *_{a t m}^{-1} K_{H}\left(C O_{2}\right)=3.41 \times 10^{-2} \mathrm{~mol}^{*} L^{-1 *_{7} \mathrm{~atm}^{-1}}

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