SDS Volume (2744)
Volume 62. Carbon Dioxide in Water and Aqueous Electrolyte Solutions, p None
Original Measurements
Van Slyke, D. D.; Sendroy Jr., J.; Hastings, A. B.; Neill, J. M.; J. Biol. Chem. 1928, 78, 765-99.
Variables:
Room Temp:
311.2
$\pu{K}$
Pressure:
"atmospheric"
$\pu{atm}$
Amount concentration (2):
C2/mol L-1 = 0.300 and 0.600
g/L
Prepared by:
Method/Apparatus/Procedure:
Solutions were saturated with $\ce{CO2}$ by a bubbling method:
Saturation by bubbling. The solution was placed in the saturating tube, the lower end of which was connected through a wash bottle with a Kipp $\ce{CO2}$ generator. The tube and the wash bottle were immersed in a constant temperature bath. $\ce{CO2}$ was bubbled through it rapidly for 30 minutes. The wash bottle was replaced by a mercury reservoir and the free gas was driven completely out of the saturating tube by admitting mercury underneath the solution. The $\ce{CO2}$ contents of the solutions were determined in the manometric gas apparatus (Refs 1 and 2).
Source and Purity of Materials:
- From a Kipp $\ce{CO2}$ generator.
- The $\ce{KHC2O4}$ solutions were prepared from $\ce{K2C2O4}$ plus equimolar amounts of free oxalic acid crystals.
- Distilled.
Estimated Errors:
Ambient temperature: δT/K = ±0.1
Mass concentration (m/v) (1): δα/α = ±0.005
References
1
Van Slyke, D. D.; Neill, J. M.; J. Biol. Chem. 1924. 61, 523-35.
2
Van Slyke, D. D.; Sendroy Jr., J.; J. Biol. Chem. 1927, 73, 127.
Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Potassium hydrogen oxalate, $\ce{ C2HO4K }$; [127-95-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ ($\pu{K}$) | $T$ (°C) | $C_{2}$ (mol/L) | α ($\pu{cm3(g) cm-3(l) atm-1}$) | $S$ |
|---|---|---|---|---|
| 311.2 | 38.0 | 0.300 | 0.5211 | 0.5328 |
| 311.2 | 38.0 | 0.600 | 0.4969 | 0.1340 |
(a) Calculated by the compiler.
(b) 1 mmHg = 133.322 Pa = 1.33322 x 10-3 bar
(c) α = Bunsen coefficient [cm3 (STP) cm-3 atm-1].
(d) S1 = Kuenen coefficient [cm3 (STP) g-1 atm-1].
