IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Water-d2 and Water

Components:
   (1) Water-d₂; D2O; [7789-20-0]  NIST Chemistry WebBook for detail
   (2) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Salomaa, P.; Vesala, A.; Vesala, S., Acta Chem. Scand. 1969, 23, 2107-15.

Variables:
   Temperature = 298.15 K
   Pressure = 101.325 kPa
   Concentration = x(D;L₂O) = 0.000 - 0.997

Prepared By:
   Pirketta Scharlin

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


T/K	Temp Note	Density ρ [g/cm³]	Density Note	Dilution	Dilution Note	Ostwald coefficient L [cm³/cm³]	Ostwald Note	10² * Molality m₁ [mol/kg]	m₁ Note
298.15	a	0.99705 (f)	d	0.000	b	0.8196 (20)	c	3.377	a, e
298.15	a	1.05113	d	0.498	b	0.8189 (20)	c	3.201	a, e
298.15	a	1.08743	d	0.833	b	0.8154 (23)	c	3.081	a, e
298.15	a	1.10523	d	0.997	b	0.8149 (18)	c	3.029	a, e

Notes:
   ^a  Calculated by the compiler.
   ^b  x(D;L₂O) is the deuterium mole fraction of solvent water (L = H, D).
   ^c  L = Ostwald coefficient
The figure in the parentheses after each L is the number of measurements made in the corresponding solvent composition.
   ^d  p(L₂O) = density of solvent water (L = H, D). Densities were calculated by the compiler using Eq. (5) in the evaluation section.
   ^e   m₁ = molality of carbon dioxide.
   ^f  Density for pure H₂O at 298.15 K was taken from Recommended Reference Materials for the Realization of Physicochemical Properties, Edited by K.N> Marsh, Blackwell, 1987, p. 27.

Method/Apparatus/Procedure:
   The equipment employed for the solubility measurements on CO₂ was of the Ostwald type.^1,2 Before each measurement, the water was freed from dissolved air by boiling under reflux. The CO₂ which was passed into the absorption apparatus was purified by passing it subsequently through acidic ferric sulfate, iodine, potassium permanganate, and water. The gas was finally dried carefully with magnesium perchlorate.

Source and Purity of Materials:
   (1) From commercial tank.
   (2) Norsk Hydro-Elektrisk Kvaelstofaktieselskab, Norway. Analyzed and purified as described in Ref. 3.
   (3) Distilled,degassed.

Estimated Errors:
   Solubility: δL ≈ ± 0.2 % (estimated by compiler)

References:
   1. Just, G., Z. physik. Chem. (Leipzig) 1901, 37, 342.
   2. Curry, J.; Hazelton, C. L., J. Am. Chem. Soc. 1938, 60, 2771.
   3. Salomaa, P., Acta Chem. Scand. 1966, 20, 1263.