IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethanol with Heptane and Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Ethanol (ethyl alcohol); C2H6O; [64-17-5]  NIST Chemistry WebBook for detail
   (3) Heptane (n-heptane); C7H16; [142-82-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Bonner, W.D., J. Phys. Chem. 14, 738 (1909-1910).

Variables:
   Temperature = 273 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)

Compositions along the saturation curve
T/K	Mass Fraction w₁ (compiler)	Mass Fraction w₂ (compiler)	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
273.2	0.4131	0.5646	0.5662	0.3557
273.2	0.6276	0.3285	0.7044	0.1695
273.2	0.7037	0.2364	0.7289	0.1126
273.2	0.7462	0.1673	0.7145	0.0736
273.2	0.7509	0.1524	0.7030	0.0656
273.2	0.7601	0.1092	0.6640	0.0438
273.2	0.7549	0.0674	0.6086	0.0250
273.2	0.7475	0.0495	0.5797	0.0176
273.2	0.6974	0.0281	0.4939	0.0092

Method/Apparatus/Procedure:
   In a tube 1 cm diameter and 12 cm long known amount, by weight, of hydrocarbon and water were placed into a temperature controlled bath. The contents of the tube were stirred and alcohol was added gradually until a homogeneous solution was obtained. Observations were made visually through the telescope of a cathetometer. The samples were always weighed immediately before and after each experiment. Concentrations were reported as weight of water in 1 g of binary water-hydrocarbon mixture and the weight of alcohol necessary to make a homogenous solution. The mass of binary water-hydrocarbon mixture was about 1 g; the mass of alcohol-up to 5 g.

Source and Purity of Materials:
   (1) Kahlbaum; presumably dried and distilled.
   (2) Kahlbaum; presumably dried and distilled.
   (3) Source not specified.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Accuracy of weighing 0.0001 g.