IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Benzene with Deuterium oxide (heavy water)

Components:

Original Measurements:
   Backx, P.; Goldman, S., J. Phys. Chem. 1981, 85, 2975-9.

Variables:
   Temperature = 283-313 K

Prepared By:
   A. Maczynski

Experimental Data:   (Notes on the Nomenclature)

Solubility of deuterium oxide in benzene
T/K	10³ * g₂/100 g solution (compiler)	10³ * Mole Fraction x₂	x₂ Note
283	0.436	1.70	std. dev. = 0.03
288	0.490	1.91	std. dev. = 0.03
293	0.557	2.17	std. dev. = 0.04
298	0.689	2.68	std. dev. = 0.06
303	0.776	3.02	std. dev. = 0.04
308	0.915	3.56	std. dev. = 0.04
313	1.057	4.12	std. dev. = 0.08

Method/Apparatus/Procedure:
   In a 175-ml milk dilution bottle fitted with a Bakelite screw cap and a Teflon insert and rotated end-over-end, (1) was equilibrated with an excess of (2), sampled with Hamilton syringes and titrated in an Aquatest II automatic Karl Fischer Titrator.

Source and Purity of Materials:
   (1) certified grade; washed successfully with conc. H₂SO₄, H₂O, 1 N NaOH, again H₂O, dried with silica gel, and distilled; d²⁵ 0.87365.
   (2) Obtained from the manufacturer; minimum isotopic purity of 99.7 atom % D.

Estimated Errors:

   Temperature: ± 0.01 K
Std. dev. of soly calcd from 25-36 determinations reported above.