Components:

(1) 1,4-Dimethylbenzene, C₈H₁₀; [106-42-3] NIST WebBook
(2) Water, H₂O; [7732-18-5] NIST WebBook

Original Measurements

Sanemasa, I.; Araki, M.; Deguchi, T.; Nagai, H.; Bull. Chem. Soc. Jpn. 1982, 55, 1054-62.

Variables:

Ambient temperature: 15 - 45 °C

Prepared by:

G.T. Hefter

Method/Apparatus/Procedure:

The apparatus is similar to an earlier design (ref 2) and is described in detail in the paper. 100-200 cm³ of (2) and 10-20 cm³ of liquid (1) were placed in separate but connected thermostatted flasks. After thermal equilibrium was established a recirculating stream of air was used to vaporize liquid (1) and to transport the vapor to the flask containing (2). Five 10 cm³ aliquots were withdrawn into separatory funnels. The concentration of (1) in (2) was then determined by extraction into chloroform followed by UV-spectrophotometry. Standards for the spectrophotometry were prepared by weight from pure liquid solutes.

Source and Purity of Materials:

1. Analytical reagent grade (Wako Pure Chemical Ind. Ltd.), stated purity 98.0%, used without further purification.
2. Redistilled; no further details given.

Estimated Errors:

Ambient temperature: ±0.1°C
Mass concentration (m/v) (1): see table, type of error not specified.

References

¹ Kell, G. S.; J. Chem. Eng. Data 1975, 20, 97.
² Sanemasa, I.; Araki, M.; Deguchi, T.; Nagai, H.; Chem. Lett. 1981, 225-8.