Compilation - Hexane with Water (IUPAC SDS Volume 37)
SDS Volume (411)
Volume 37. Hydrocarbons in Water and Seawater, Part I, p 341
Original Measurements
Roddy, J. W.; Coleman, C. F.; Talanta 1968, 15, 1281-6.
Variables:
Room Temp: 25 °C
Prepared by:
Method/Apparatus/Procedure:
A method of gravimetric absorption monitored by tritium tracer was used. (1) was equilibrated with a slight excess of titrated water by shaking over a period of at least 8 hr in a thermostat. The phases were allowed to separate for at least 16 hr and then were sampled for tritium analysis. Most of the (1) phase was weighed into a boiling flask of a closed distillation system and then distilled through a magnesium perchlorate weighing tube. The magnesium perchlorate was then dissolved for measurement of its tritium content by liquid scintillation counting with a Packard Tri-Carb Scintillation Spectrometer.
Source and Purity of Materials:
- Phillips Petroleum Co.; 99%; purified by shaking with concentrated sulphuric acid, washed with water and dried with sodium sulphate.
- tritiated water at 5 Ci.mL; New England Nuclear Corp.; diluted to about 1 mCi/mL.
Estimated Errors:
Mass concentration (m/v) (1): better than 1% (type of error not specified)
References
1 Timmermans, J.; Physico-Chemical Constants of Pure Organic Compounds (Elsevier, New York, 1950).
Components:
- Hexane, $\ce{ C6H14 }$; [110-54-3] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The solubility of water in hexane at 25°C was reported to be 0.00362 mol(2) dm-3 sln corresponding to a mole fraction, x2, of 4.76 × 10-4. The corresponding mass percent value calculated by the compiler is 0.00995 g(2)/100 g sln.
The compiler's calculation assumes a solution density of 0.6629 g/mL (the density of hexane reported in ref 1).
