Components:
(1) Toluene,
C7H8; [108-88-3]
NIST WebBook
(2) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Bohon, R. L.; Claussen, W. F.; J. Am. Chem. Soc. 1951, 73, 1571-8.
Variables:
Ambient temperature: 0.4 - 45.3 °C
Prepared by:
Method/Apparatus/Procedure:
A round-bottomed flask containing about 4 mL of (1) and 400 mL of 92) was evacuated, suspended in a thermostat, shaken for 24h and then allowed to settle for at least another 24h. Next, desired quantities of the water layer were syphoned into 6 glass-stoppered Erlenmeyer flasks. These 6 flasks had previously been tared, partially filled with a suitable amount of diluent water, and reweighed. Weighed portions of the samples were inserted into a quartz cuvette and measured in a Beckman DU spectrophotometer. Absorbances were corrected for adsorption of (1) onto the walls of the cuvette.
Source and Purity of Materials:
- Phillips Petroleum Co., 99+%, used as received.
- Air-free conductivity water, no further details given.
Estimated Errors:
Ambient temperature: ±0.02°C
Mass concentration (m/v) (1): ±0.5% relative
Experimental Values:
Solubility of Toluene in water
| T (°C) | x1 | MR1 (g1/100 g sln) |
|---|---|---|
| 4 x 10-1 | 1.29 x 10-4 | 6.58 x 10-2 |
| 3.6 | 1.26 x 10-4 | 6.46 x 10-2 |
| 10.0 | 1.23 x 10-4 | 6.28 x 10-2 |
| 11.2 | 1.22 x 10-4 | 6.24 x 10-2 |
| 14.9 | 1.22 x 10-4 | 6.23 x 10-2 |
| 15.9 | 1.21 x 10-4 | 6.21 x 10-2 |
| 25.0 | 1.23 x 10-4 | 6.27 x 10-2 |
| 25.6 | 1.22 x 10-4 | 6.25 x 10-2 |
| 30.0 | 1.25 x 10-4 | 6.40 x 10-2 |
| 30.2 | 1.25 x 10-4 | 6.42 x 10-2 |
| 35.2 | 1.28 x 10-4 | 6.57 x 10-2 |
| 42.8 | 1.37 x 10-4 | 7.01 x 10-2 |
| 45.3 | 1.40 x 10-4 | 7.17 x 10-2 |
(a) Solubilities of (1) in (2) were reported as "optical density" (absorbance) measurements. Solubilities were calculated by the compiler using the Beer-Lambert law, the stated cell path-length (1 cm) and the authors' "extinction coefficients" (absorptivities) and corrected optical densities. This gave a solubility of g(1)/L sln which was then converted to g(1)/100g sln by assuming a solution density of 1.00 kg/L. (b) Given in the original paper as 0.627 g(1)/L sln.
