Components:
(1) Toluene,
C7H8; [108-88-3]
NIST WebBook
(2) Sodium chloride,
NaCl; [7647-14-5]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Sada, E.; Kito, S.; Ito, Y.; J. Chem. Eng. Data 1975, 20, 373-5.
Variables:
Ambient temperature: 25 °C
Salinity: 29 - 108 g(3)/kg sln
Prepared by:
Method/Apparatus/Procedure:
Experimental apparatus and prodecure used similar to those in ref 2.
Toluene stained with 0.1% by weight Sudan IV was added dropwise from a microburet into aqueous salt solution retained in a 1-L dissolution flask which was kept at 25.00° ± 0.01°C in a thermostatically controlled water bath. The aqueous by a magnetic stirring device. Before saturation was reached, the Sudan IV ws precipitated and floated on the surface as a solid. At saturation, the excess toluene appeared as immiscible red liquid droplets suspended in the aqueous solution. To ensure complete saturation, 24 hr was allowed for equilibration.
Source and Purity of Materials:
- Reagent grade, source not specified.
- Reagent grade, source not specified.
- Not specified
Estimated Errors:
Mass concentration (m/v) (1): 0.008 × 10-3 L (1)/L sln.
References
1
Weast, R. C.; CRC Handbook of Chemistry and Physics, 59th Edition; CRC Press, 1978, pp D299-D300.
2
Sobotka, H.; Kahn, J.; J. Am. Chem. Soc. 1931, 53, 2935.
Experimental Values:
Solubility of toluene in aqueous sodium chloride solutions
| T (°C) | x1 | MR1 (g1/100 g2) | MR2 (g/kg) | C2 (mol/L) |
|---|---|---|---|---|
| 25.0 | 6.95 x 10-5 | 3.48 x 10-2 | 28.72 | 5.011 x 10-1 |
| 25.0 | 5.06 x 10-5 | 2.48 x 10-2 | 56.14 | 9.991 x 10-1 |
| 25.0 | 3.76 x 10-5 | 1.82 x 10-2 | 82.66 | 1.4933 |
| 25.0 | 2.87 x 10-5 | 1.36 x 10-2 | 107.9 | 1.9933 |
(a) Calculated by compilers using density and other physical data for NaCl solutions from ref 1 and the assumption that the density of (1) is 0.8669 kg/L.
