IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: p-Xylene with Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) p-Xylene; C8H10; [106-42-3]  NIST Chemistry WebBook for detail
Original Measurements:
   Kirchnerova, J.; Cave, G.C.B., Can. J. Chem. 1976, 54(24), 3909-16.

 Variables:
   Temperature = 25 °C

 Prepared By:
   A. Maczynski and Z. Maczynska

 Experimental Remarks:
   The solubility of water in p-Xylene at 25°C was reported to be 0.0217 mol(2)/L and x2 = 0.00269. The corresponding mass percent calculated by the compilers is 0.0457 g(2)/100 g sln.

 Experimental Data:   (Notes on the Nomenclature)
  
Solubility of water in 7,8-dimethyltetradecane
t/°Cg2/100 g solution104 * Mole Fraction x2 (compiler)
200.00779.67
 Notes:
   *  g(2)/kg, Mass %, and x1 are calculated by compilers using density and other physical data for NaCl solutions from ref 1.

 Method/Apparatus/Procedure:
   Approximately 50 mL of (1) was placed in the equilibration vessel. A test tube containing 6 mL of (2) was then placed in the vessel so that the rim of the test tube rested against the upper inside wall of the vessel. The vessel was then stoppered, placed inside a plastic bag, and the jacketed vessel was emersed up to its neck in a water thermostat. Trials had shown that the stoichiometric concentration of (1) in (2) became constant within 2 days.
The stoichiometric concentration of water was determined by a conventional Karl Fischer dead-stop back-titration.

 Source and Purity of Materials:
   (1) Fisher 277; purified by double crystallization.
   (2) not specified.

 Estimated Errors:
   Solubility: 0.0002 mol (2) dm-3 sln (standard deviation from 5 determinations).
   Temperature: ± 0.1°C