Saturated Solutions; Factors Affecting Solubility (Sections)
The partial pressure of O2 in air at sea level is 0.21 atm. Using the data in Table together with Henry’s law, calculate the molar concentration of O2 in the surface water of a mountain lake saturated with air at 20 °C and an atmospheric pressure of 650 torr.
Table Solubilities of Gases in Water at 20 °C, with 1 atm Gas Pressure
Gas | Molar Mass (g/mol) | Solubility (M) |
N2 | 28.0 | 0.69 × 10-3 |
O2 | 32.0 | 1.38 × 10-3 |
Ar | 39.9 | 1.50 × 10-3 |
Kr | 83.8 | 2.79 × 10-3 |
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