SDS Volume (3780)

Volume 69. Ternary Alcohol-Hydrocarbon-Water Systems, p None

Original Measurements

Washburn, E. R.; Strandskov, C. V.; J. Phys. Chem. 48, 241 (1944)

Variables:

Room Temp: 298 and 308 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

Solubilities were determined by titration of weighed solutions to permanent appearance of a second phase. Observations were made with both reflected and transmitted light and against a light or dark background. The titrant was added from a pipet which ended with in fine capillary; the amount added was determined by weight. The total mass of the mixture was 18-25 g. Refractive indexes of saturated solutions were measured and plotted as a function of concentration. Tie-lines were determined by adding alcohol in varying amounts to binary water-benzene mixtures. After separation, refractive indexes of conjugate layers were determined and the concentrations were read from the plots.

Source and Purity of Materials:

1. Eastman Kodak Co., better grade; dried by refluxing over active lime, distilled; $d_{4}^{25}$ = 0.806 49.
2. Coleman and Bell, reagent quality grade; dried with $\ce{Na}$, crystallized several times; FP = 5.45°C.
3. Doubly distilled over $\ce{KMnO4}$.

Estimated Errors:

Ambient temperature: Temp. ±0.1°C.
Mass concentration (m/v) (1): Not reported.