SDS Volume (2730)
Volume 62. Carbon Dioxide in Water and Aqueous Electrolyte Solutions, p None
Original Measurements
Vázquez, G.; Chenlo, F.; Pereira, G.; Peaguda, J.; An. Quim. 1994, 90, 324-28.
Variables:
Room Temp:
298.1
$\pu{K}$
Pressure:
1.013 bar
$\pu{bar}$
Molality (2):
m2/mol kg-1 = 0.245 - 1.835
mol/kg
Prepared by:
Method/Apparatus/Procedure:
The apparatus is a combination of previous designs [1,2]. It was modified to achieve a more accurate determination of the volume of the absorbent liquid. The apparatus measures the volume of absorbed gas as the volume of mercury that must be supplied to the system in order to restore the initial pressure.
The raw solubility data obtained are gas/ liquid volume ratios. A detailed description of apparatus, method and procedure is given in [3].
Source and Purity of Materials:
- Commercial, purity 99.5 mole%
- Merck. Grade not given.
- Distilled and degassed.
Estimated Errors:
Ambient temperature: δT/K = ±0.1
Mass concentration (m/v) (1): δc1/c1 < ±1% [estimated by compiler on the basis of the information in Ref. 3]
Pressure: δP/bar = ±0.001
References
1
Alvarez, J. R.; Fernandez, A.; Coll, A., Ing. Quim. 1984, 16, 67.
2
Haimour, N.M.; J. Chem. Eng. Data 1990, 35, 177.
3
Vázquez, G.; Chenlo, F.; Pereira, G.; Peaguda, J.; J. Chem. Eng. Data 1994, 39, 639.
Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Potassium iodide, $\ce{ KI }$; [7681-11-0] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ ($\pu{K}$) | m2 (mol/kg) | $L$ | ρ (g/L) | $C_{1}$ (mol/dm3) | Cm1 (g/dm3) |
|---|---|---|---|---|---|
| 298.1 | 0.245 | 0.741 | 1.024 x 103 | 0.0303 | 4E+1 |
| 298.1 | 0.495 | 0.714 | 1.053 x 103 | 0.0292 | 8E+1 |
| 298.1 | 0.751 | 0.692 | 1.082 x 103 | 0.0283 | 1.2E+2 |
| 298.1 | 1.014 | 0.692 | 1.111 x 103 | 0.0283 | 1.6E+2 |
| 298.1 | 1.280 | 0.665 | 1.141 x 103 | 0.0272 | 2E+2 |
| 298.1 | 1.563 | 0.658 | 1.165 x 103 | 0.0269 | 2.4E+2 |
| 298.1 | 1.835 | 0.653 | 1.199 x 103 | 0.0267 | 2.8E+2 |
(a) γ2 = mass concentration of KI
(b) p = density of aqueous KI solution
(c) m2 = molality of KI; calculated by the compiler.
(d) c1 = solubility of CO2
(e) L = Ostwald coefficient [cm3 cm-3]
