SDS Volume (2581)
Volume 62. Carbon Dioxide in Water and Aqueous Electrolyte Solutions, p None
Original Measurements
Ownby, D. W.; Prapaitrakul, W.; King Jr., A. D.; J. Colloid Interface Sci. 1988, 125, 526-33.
Variables:
Room Temp:
298.15
$\pu{K}$
Molality (2):
m2/mol kg-1 = 0.0 - 0.4
mol/kg
Prepared by:
Method/Apparatus/Procedure:
The apparatus and method are described in earlier papers (1, 2). Solubility is determined in a thermostatted, magnetic stirred cylindrical brass bomb with an observation window. The solution is prepared and put in a glass liner in the bomb. The system is sealed, evacuated to a pressure just above water vapor pressure, and outgassed with stirring for several hours. The gas is added to a known pressure and equilibrated with stirring for a minimum of five hours. Stirring is stopped, the solution is allowed to become still. The gas is vented leaving the supersaturated solution under a gaseous pressure of atmospheric pressure for a fixed time of 30 to 60 seconds. The rate of gas loss during the still condition is measured to use in a later correction. The gas is stirred and collected. The total volume of gas is measured along with ambient pressure and temperature.
Source and Purity of Materials:
- Carbon dioxide. Matheson Gas products. Commercial grade, stated to be 99.5% min purity.
- Cetyltrimethylammonium bromide. Lancaster Synthesis Ltd. Stated to be 98.0%.
- Water. Nothing specified, but have used doubly distilled water in earlier work.
Estimated Errors:
Ambient temperature: δT/K not specified
Mass concentration (m/v) (1): δm1/mol kg-1 = 0.02 × 10-2
References
1
Matheson, I. B. C; King Jr., A. D.; J. Colloid Interface Sci. 1978, 66, 464.
2
Bolden, P. L.; Hoskins, J. C.; King Jr., A. D.; J. Colloid Interface Sci. 1983, 91, 454.
Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Cetyltrimethylammonium bromide, $\ce{ C19H42N.Br }$; [57-09-0] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The measurements are made at several pressures up to 10 - 15 atm (1 - 1.5 MPa). The solubility values have been corrected to 1 atm (0.103 MPa) partial pressure of CO2. See method below.
Solubility of carbon dioxide in aqueous cetyltrimethylammonium bromide.
| $T$ ($\pu{K}$) | $T$ (°C) | m1 (mol/kg) | m2 (mol/kg) |
|---|---|---|---|
| 298.15 | 25 | 0.0328 | 0.0 |
| 298.15 | 25 | 0.0346 | 0.1 |
| 298.15 | 25 | 0.0360 | 0.2 |
| 298.15 | 25 | 0.0373 | 0.3 |
| 298.15 | 25 | 0.0388 | 0.4 |
(a) Added by the compiler.
(b) m2 = molality of cetyltrimethylammonium bromide.
(c) m1 = solubility of carbon dioxide.
