Compilation - Carbon dioxide with Water (IUPAC SDS Volume 62)
SDS Volume (2706)
Volume 62. Carbon Dioxide in Water and Aqueous Electrolyte Solutions, p None
Original Measurements
Morgan, J. L. R.; Pyne, H. R.; J. Phys. Chem. 1930, 34, 1578-82.
Variables:
Room Temp:
298.15
$\pu{K}$
Pressure:
101.325
$\pu{kPa}$
Prepared by:
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:
- 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.
- Distilled.
Estimated Errors:
Mass concentration (m/v) (1): δL/L = ±0.005 (compiler)
Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ ($\pu{K}$) | $T$ (°C) | $x_{1}$ | $L$ |
|---|---|---|---|
| 298.15 | 25 | 6.135 x 10-4 | 0.8265 |
| 298.15 | 25 | 6.137 x 10-4 | 0.8267 |
(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.
