IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 2,2'-Bipyridine with Ethanol and Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Ethanol; C2H6O; [64-17-5]  NIST Chemistry WebBook for detail
   (3) 2,2-Bipyridine; C10H8N2; [366-18-7]  NIST Chemistry WebBook for detail

Original Measurements:
   Burgess, J.; Haines, R.I., Chem. Ind. (London) 1980, 289.

Variables:
   Temperature = 298 K
   Concentration = Solvent composition

Prepared By:
   W. E. Acree, Jr.

Experimental Data:   (Notes on the Nomenclature)


t/°C	Concentration c₁ [mol dm**-3]	Ø₂
25.0	0.037	0.00
25.0	0.114	0.10
25.0	0.240	0.20
25.0	0.76	0.30

Notes:
     ø₂^(s): initial volume fraction of binary solvent mixture; c₁: solubility of the solute expressed in terms of molarity.

Method/Apparatus/Procedure:
   Constant temperature bath, and an ultraviolet/visible spectrophotometer. Excess solute and binary solvent equilibrated in a constant temperature vessel. Aliquots of saturated solution withdrawn and concentrations determined spectrometrically at 283 nm. Attainment of equilibrium verified by several repetitive measurements.

Source and Purity of Materials:
   (1) Purity and chemical source not specified, was recrystallized from aqueousethanol.
   (2) Purity and chemical source not specified in paper.
   (3) Purity and chemical source not specified in paper.

Estimated Errors:
   Solubility: ø₂^(s): ± 0.01. c₁: ± 3 % (relative error; compiler).
   Temperature: T/K: ± 0.1 (Compiler).

References:
   ¹W.E. Acree, Jr.