Components:
(1) Naphthalene,
C10H8; [91-20-3]
NIST WebBook
(2) Sodium chloride,
NaCl; [7647-14-5]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Gordon, J. E.; Thorne, R. L.; J. Phys. Chem. 1967, 71, 4390-9.
Variables:
Ambient temperature: 24.91 °C
Salinity: 0 - 108 g (2)/kg sln
Prepared by:
Method/Apparatus/Procedure:
Saturated solutions were prepared by equilibrating excess (1) in salt water in sealed ampols for 24 hrs. After filtration the absorbance was measured with a UV spectrophotometer at three wavelengths.
Source and Purity of Materials:
- recrystallized four times and sublimed or zone refined, 99.99+% pure,
- analytical reagent grade,
- distilled from potassium permanganate and redistilled from all glass still.
Estimated Errors:
Ambient temperature: ±0.03°C
Mass concentration (m/v) (1): see above.
Experimental Values:
Note: The solubility of naphthalene in aqueous sodium chloride is reported in terms of the Setschenow equation:log(So/S) = KsCs
where, So is the solubility of naphthalene in water (mol/L); S is the solubility of naphthalene in solution (mol/L); Ks is the Setschenow constant (L/mol); Cs is the concentration of sodium chloride (mol/L)
evaluating the equation for S over the range of Cs 0-2 mol/L, log So = -3.590 ± 0.004 (95% confidence limit) and Ks = 0.220 ± 0.0041 (95% confidence limit).
The corresponding mass percent and mole fraction, x1 at salinity = 35 g(2)/kg sln calculated by the compilers are 2.36 × 10-3 g(1)/100 g sln and 3.48 × 10-6 assuming a solution density of 1.025 kg/L.
