Aqueous Solubility and Henry’s Law Constants.pdfVIP

aQueouS SoluBility and henry’S laW conStantS of organic comPoundS The solubility in water of about 1300 organic compounds, in- partial pressure of the solute above the solution and c2 is the con- cluding many compounds of environmental interest, is tabulated centration in the solution at equilibrium (other formulations of here . When data are available, values are given at several tempera- Henry’s Law are often used; see Reference 5) . The values of kH list- tures between 0 °C and 100 °C . Solids, liquids, and gases are includ- ed here are based on direct experimental measurement whenever ed; additional data on gases can be found in the table “Solubility of available, but many of them are simply calculated as the ratio of the Selected Gases in Water” in Section 8 . pure compound vapor pressure to the solubility . This approxima- Solubility of solids is defined as the concentration of the com- tion is reliable only for compounds of very low solubility . In fact, pound in a solution that is in equilibrium with the solid phase values of kH found in the literature frequently differ by a factor of at the specified temperature and one atmosphere pressure . For two or three, and variations over an order of magnitude are not liquids whose water mixtures separate into two phases, the solu- unusual (Reference 5) . Therefore, the data given here should be bility given here is the concentration of the specified compound taken only as a rough indication of the true Henry’s Law constant, in the water-rich phase at equilibrium . In the case of gases (i .e .,