IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 2-Heptene with Water

   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Heptene; C7H14; [592-77-8]  NIST Chemistry WebBook for detail

Original Measurements:
   Schwarz, F.P., Anal. Chem. 1980, 52, 10-15.

   Temperature = One temperature: 23.5 °C

Prepared By:
   M.C. Haulait-Pirson

Experimental Remarks:

   Solubility of 2-heptane in water at 23.5°C was reported to be 0.00150 ± 0.00003 g(1)/100 g sln.
The corresponding mole fraction, x1, calculated by the compiler is 2.75 x 10-6.

Experimental Data:   (Notes on the Nomenclature)
   An elusion chromatography method was used where (1) was the stationary phase and (2) the mobile phase. A transparent column was packed with an inert support (chromosorb P) coated with a known amount of the liquid solute (1). This solute column was connected to a water reservoir (connected to a compressed gas regulator). Water was forced through the column by the pressure of the compressed gas (ca. 14 kPa). As the total volume of water flowing through the column increased, a solute depleted zone, different in color from the stationary phase, developed and increased in length. The solubility is calculated from the amount of solute removed from the column, I.e. length of the solute depleted zone, and the volume of water passed through the column. Many details about preparation of the solute column and calculation are given in the paper.

Source and Purity of Materials:
   (1) 99% purity used without further purification
   (2) distilled

Estimated Errors:
   Solubility: 2% (average std. Dev.)
   Temperature: ± 1.5°C