SDS Volume (3690)

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

Original Measurements

Baker, E. M.; J. Phys. Chem. 59, 1182 (1955).

Variables:

Room Temp: 298 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

The titration and analytical methods were used. Weighed portions of 1-propanol and toluene in glass stoppered flasks were titrated with water from a calibrated burette. After each portion of water the mixture was shaken and the temperature of the solution was allowed to return to 25 °C before further additions of water. When the end-point was reached, the mixture was left in the bath for 30 min before specific gravity and refractive index were determined. The binary two liquid-phase mixtures of toluene and water were treated with 1-propanol and when equilibrium was reached the samples of each layer were removed and refractive indexes were determined. A large-scale graph of refractive index, constructed during the binodal curve determinations, was used to find equilibrium concentrations.

Source and Purity of Materials:

1. Eastman Kodak Co., distilled over $\ce{CaCI2}$, middle fraction was used;
   $d_{4}^{25} = \pu{0.79999 \pm 0.0002}$, $n_{D}^{25} = \pu{1.3854 \pm 0.0001}$.
2. Source not specified; analytical reagent grade; dried over sodium, distilled;
   $d_{4}^{25} = \pu{0.85939 \pm 0.0002}$, $n_{D}^{25} = \pu{1.3325 \pm 0.0001}$.
3. Distilled from alkaline potassium permanganate.

Estimated Errors:

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