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
Mackay, D.; Shiu, W. Y.; Can. J. Chem. Eng. 1975, 53, 239-42.
Variables:
Ambient temperature: 25 °C
Salinity: 0-200 g(2)/kg sln
Prepared by:
Method/Apparatus/Procedure:
Solubility was determined by vapor phase extraction and gas chromatographic analysis. This method does not require the preparation of saturated solutions and thus avoids one of the major sources of error of other methods.
Source and Purity of Materials:
- Research grade, 99.9+ %, from Phillips Petroleum Co.
- Not specified
- Not specified
Estimated Errors:
Ambient temperature: ±0.1 K
Mass concentration (m/v) (1): 95 % confidence limit is about 8 %
Experimental Values:
Note: The solubility of toluene in solutions of sodium chloride is reported in terms of the Setschenow equation:log(SoS) = KsCs
where,
So is the solubility of (1) in water (mg/L)
S is the solubility of (1) in saline solution (mg/L)
Ks is the Setschenow constant (L/mol)
Cs in the concentration of sodium chloride (mol/L)
evaluating the equation for S over the range of Cs 0-0.4 mol/L, Ks = 0.2052 ± 0.0056 (standard error) with So = 519.5 ± 9.6.
The corresponding mass percent and mole fraction x1, at salinity = 35 g(2)/kg sln calculated by the compilers are 3.79 × 10-2 g(1)/100 g sln and 7.743 × 10-5 assuming a density of 1.025 kg/L.
