SDS Volume
Volume 37. Hydrocarbons in Water and Seawater, Part I, p 259
Source Publication
Kirchnerová, J.; Cave, G. C. B.; Can. J. Chem. 1976, 54(24), 3909-16.
Conditions:
Room Temp: 25 °C
Compiler:
Methodology:
The Karl Fischer dead-stop back-titration method was used. 50 mL of (1) was placed in the equilibration vessel. A test tube containing 6 mL of (2) was then placed in the vessel so that the rim of the tube rested against the upper inside wall of the vessel. The vessel was then stoppered, placed inside a plastic bag and submerged in a water thermostat. Trials had shown that the concentration of (2) in (1) became constant within two days. 10 mL of (1) saturated with (2) were transferred to the titration vessel for water determination. Apparatus is described in the paper.
Sample Information:
- Fisher C-555; purified by double crystallization; purity $\pu{99.6\%}$ (gas chromatographic analysis); $d_{4}^{25} = \pu{0.7734 \pm 0.00001}$
- distilled and de-ionized
Measurement Errors:
Ambient temperature: ±0.1 K
Mass concentration (m/v) (1): ±0.0002 mol(2)/dm3 sln (std. dev. from 5 determinations)
Methodology Citation
System Components:
- Cyclohexane, $\ce{ C6H12 }$; [110-82-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The solubility of water in cyclohexane at 25°C was reported to be 0.0030 mol (2)/dm3 sln.
With the assumption of a solution density of 0.7739 g cm-3 (density value of pure cyclohexane reported in ref 1, the corresponding mass percent is 0.0070 g(2)/100 g sln and the corresponding mole fraction, x2, is 3.3 × 10-4 (compiler).
