IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Carbon dioxide with Water
Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
Original Measurements:
   Morgan, J.L.R.; Pyne, H.R., J. Phys. Chem. 1930, 34, 1578-82.

 Variables:
   Temperature = 298.15 K
   Pressure = 298.15 K

 Prepared By:
   H.L. Clever

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
t/°CT/KOstwald coefficient L [cm3/cm3]Ostwald NoteMole Fraction (x1)x1 Note
25298.150.8265a6.135b
25298.150.8267a6.137b
 Notes:
   a  L = Ostwald coefficient

The two Ostwald coefficients reported by the authors were the average values reported from measurements using versions 3 and 4 of their apparatuses.
   b  Calculated by the compiler.

A real gas CO2 volume of 24.340 dm3 mol-1 and a solution density the same as for pure water were assumed.

 Method/Apparatus/Procedure:
   The authors were concerned that too vigorous shaking might lead to supersaturation because of local pressure differences. They designed four versions of an apparatus in which the gas and solvent would be contacted at atmospheric pressure only.
In the final version the gas is circulated through the degassed solvent in an all-glass apparatus by a pumping system of mercury reservoirs and bulbs activated by a rocking beam.
The solvent was degassed by boiling under reduced pressure for one hour.

 Source and Purity of Materials:
   (1) prepared by the action of sulfuric acid on an aqueous solution of sodium bicarbonate. The gas was passed through several wash bottles containing distilled water.
   (2) Distilled.

 Estimated Errors:
   Solubility: δL/L = ± 0.005 (compiler)