Components:
(1) 1-Propanol,
C3H8O; [71-23-8]
NIST WebBook
(2) Toluene,
C7H8; [108-88-3]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Baker, E. M.; J. Phys. Chem. 59, 1182 (1955).
Variables:
Ambient temperature: 298 K
Prepared by:
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:
- Eastman Kodak Co., distilled over CaCI2, middle fraction was used; d(25°C,4°C)=0.799 99±0.0002, n(25°C,D)=1.3854±0.0001.
- Source not specified; analytical reagent grade; dried over Na, distilled; d(25°C,4°C)=0.859 39±0.0002, n(25°C,D)=1.3325±0.0001.
- Distilled from alkaline potassium permanganate.
Estimated Errors:
Ambient temperature: Temp. ±0.1°C.
Mass concentration (m/v) (1): Not reported.
Experimental Values:
Compositions along the saturation curve
| T (°C) | T (K) | w1 | w2 | x1 | x2 |
|---|---|---|---|---|---|
| 25.0 | 298.2 | 8.493 x 10-2 | 9.1016 x 10-1 | 1.2221 x 10-1 | 8.5422 x 10-1 |
| 25.0 | 298.2 | 1.0297 x 10-1 | 8.8978 x 10-1 | 1.4554 x 10-1 | 8.2027 x 10-1 |
| 25.0 | 298.2 | 1.3190 x 10-1 | 8.5784 x 10-1 | 1.8177 x 10-1 | 7.7106 x 10-1 |
| 25.0 | 298.2 | 1.8300 x 10-1 | 7.9913 x 10-1 | 2.3959 x 10-1 | 6.8237 x 10-1 |
| 25.0 | 298.2 | 2.5906 x 10-1 | 7.1136 x 10-1 | 3.1527 x 10-1 | 5.6464 x 10-1 |
| 25.0 | 298.2 | 3.0104 x 10-1 | 6.5742 x 10-1 | 3.4666 x 10-1 | 4.9377 x 10-1 |
| 25.0 | 298.2 | 3.6001 x 10-1 | 5.8484 x 10-1 | 3.8902 x 10-1 | 4.1218 x 10-1 |
| 25.0 | 298.2 | 4.4089 x 10-1 | 4.7442 x 10-1 | 4.2688 x 10-1 | 2.9959 x 10-1 |
| 25.0 | 298.2 | 4.7820 x 10-1 | 4.1460 x 10-1 | 4.3229 x 10-1 | 2.4445 x 10-1 |
| 25.0 | 298.2 | 5.4526 x 10-1 | 2.9663 x 10-1 | 4.3064 x 10-1 | 1.5280 x 10-1 |
| 25.0 | 298.2 | 5.6596 x 10-1 | 1.8299 x 10-1 | 3.7167 x 10-1 | 7.838 x 10-2 |
| 25.0 | 298.2 | 5.3954 x 10-1 | 1.1697 x 10-1 | 3.0627 x 10-1 | 4.331 x 10-2 |
| 25.0 | 298.2 | 4.2525 x 10-1 | 4.573 x 10-2 | 1.9157 x 10-1 | 1.344 x 10-2 |
| 25.0 | 298.2 | 3.0295 x 10-1 | 1.855 x 10-2 | 1.1750 x 10-1 | 4.69 x 10-3 |
| 25.0 | 298.2 | 2.2653 x 10-1 | 6.09 x 10-3 | 8.118 x 10-2 | 1.42 x 10-3 |
| 25.0 | 298.2 | 2.0969 x 10-1 | 4.44 x 10-3 | 7.399 x 10-2 | 1.02 x 10-3 |
Compositions of coexisting phases
| T (°C) | T (K) | w1 | w2 | x1 | x2 |
|---|---|---|---|---|---|
| 25.0 | 298.2 | 2.45 x 10-2 | 9.750 x 10-1 | 3.70 x 10-2 | 9.605 x 10-1 |
| 25.0 | 298.2 | 7.20 x 10-2 | 9.230 x 10-1 | 1.042 x 10-1 | 8.716 x 10-1 |
| 25.0 | 298.2 | 1.185 x 10-1 | 8.715 x 10-1 | 1.645 x 10-1 | 7.892 x 10-1 |
| 25.0 | 298.2 | 2.050 x 10-1 | 7.730 x 10-1 | 2.620 x 10-1 | 6.443 x 10-1 |
| 25.0 | 298.2 | 2.520 x 10-1 | 7.190 x 10-1 | 3.082 x 10-1 | 5.735 x 10-1 |
| 25.0 | 298.2 | 3.080 x 10-1 | 6.500 x 10-1 | 3.532 x 10-1 | 4.861 x 10-1 |
| 25.0 | 298.2 | 3.890 x 10-1 | 5.445 x 10-1 | 4.027 x 10-1 | 3.676 x 10-1 |
| 25.0 | 298.2 | 4.835 x 10-1 | 4.070 x 10-1 | 4.339 x 10-1 | 2.382 x 10-1 |
| 25.0 | 298.2 | 5.015 x 10-1 | 3.760 x 10-1 | 4.341 x 10-1 | 2.123 x 10-1 |
| 25.0 | 298.2 | 5.590 x 10-1 | 2.520 x 10-1 | 4.129 x 10-1 | 1.214 x 10-1 |
| 25.0 | 298.2 | 5.665 x 10-1 | 1.750 x 10-1 | 3.672 x 10-1 | 7.40 x 10-2 |
| 25.0 | 298.2 | 8.20 x 10-2 | 5.0 x 10-3 | 2.62 x 10-2 | 1.0 x 10-3 |
| 25.0 | 298.2 | 1.180 x 10-1 | 4.5 x 10-3 | 3.87 x 10-2 | 1.0 x 10-3 |
| 25.0 | 298.2 | 1.400 x 10-1 | 5.0 x 10-3 | 4.67 x 10-2 | 1.1 x 10-3 |
| 25.0 | 298.2 | 1.470 x 10-1 | 4.0 x 10-3 | 4.93 x 10-2 | 9 x 10-4 |
| 25.0 | 298.2 | 1.550 x 10-1 | 5.0 x 10-3 | 5.24 x 10-2 | 1.1 x 10-3 |
| 25.0 | 298.2 | 1.590 x 10-1 | 2.5 x 10-3 | 5.38 x 10-2 | 6 x 10-4 |
| 25.0 | 298.2 | 1.170 x 10-1 | 2.8 x 10-3 | 6.07 x 10-2 | 6 x 10-4 |
| 25.0 | 298.2 | 1.910 x 10-1 | 3.5 x 10-3 | 6.63 x 10-2 | 8 x 10-4 |
| 25.0 | 298.2 | 1.930 x 10-1 | 4.0 x 10-3 | 6.71 x 10-2 | 9 x 10-4 |
| 25.0 | 298.2 | 2.220 x 10-1 | 5.5 x 10-3 | 7.92 x 10-2 | 1.3 x 10-3 |
| 25.0 | 298.2 | 2.240 x 10-1 | 6.0 x 10-3 | 8.01 x 10-2 | 1.4 x 10-3 |
