We’re being asked to calculate the partial pressure of O2 above a solution at 25 °C
Recall that the solubility of a gas is given by Henry’s law:
Sgas = solubility of the gas (in mol/L or M)
kH = Henry’s law constant for the gas
Pgas = partial pressure of the gas
The Henry’s law constant for oxygen gas in water at 25 °C, kH is 1.3×10-3M/atm. What is the partial pressure of O2 above a solution at 25 °C with an O2 concentration of 2.3×10-4 M at equilibrium?
A. 0.18 atm
B. 5.7 atm
C. 1.3 x 10-3 atm
D. 2.3 x 10-4 atm
E. 3.0 x 10-7 atm
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