IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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

   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Methylbutane; C5H12; [78-78-4]  NIST Chemistry WebBook for detail

Original Measurements:
   Polak, J.; Lu, B.C.Y., Can. J. Chem. 1973, 51, 4018-23.

   Temperature = 0-25°C

Prepared By:
   M.C. Haulait-Pirson

Experimental Data:   (Notes on the Nomenclature)
Solubility of 2-methylbutane in water
t/°C103 * g1/kgg1/kg NoteMole Fraction x1 (compiler)
0 (a)72.4c1.81 x 10-5
25 (b)49.6c1.24 x 10-5
Solubility of water in 2-methylbutane
t/°C103 * g2/kgg2/kg NoteMole Fraction x2 (compiler)
0 (a)28d1.12 x 10-4
25 (b)96e3.85 x 10-4
   Table 1  a-e  see "ESTIMATED ERROR"

   The solubility of (1) in (2) was determined by gas chromatography. The solubility of (2) in (1) was determined by Karl Fischer titration. 50 mL of (1) together with 50 mL of (2) were placed in a 125 mL Hypovial closed with a Teflon coated rubber septum and placed in a constant-temperature water bath. The system was stirred magnetically for 24 hr or was kept in the bath without stirring for at least 7 days before samples were taken for analysis. Details of the analysis are given in the paper.

Source and Purity of Materials:
   (1) Phillips Petroleum Co.; pure grade reagent (99+%); shaken three times with distilled water.
   (2) distilled.

Estimated Errors:
   Solubility: c) ± 1.7%; d) ± 4.7%; e) ± 3.1% (mean)
   Temperature: a) ± 0.02 K; b) ± 0.01 K