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
Paul, M. A.; J. Am. Chem. Soc. 1952, 74, 5274-7.
Variables:
Ambient temperature: 25 °C
Salinity: 13 - 64 g(3)/kg sln
Prepared by:
Method/Apparatus/Procedure:
Equilibration flask: 50-mL glass-stoppered flask. The flask was heated in a hot-water bath until the hydrocarbon was melted, then shaken vigorously while cooling until excess hydrocarbon and recrystallized. The flask was then placed into a water bath thermostatically controlled at 25.00 ± 0.05°C for at least 48 hr, and shaken occasionally during that time. Samples were withdrawn with a 10-ml transfer pipet, diluted appropriately and analyzed using a spectrophotometer in the ultra-violet region of the spectrum.
Source and Purity of Materials:
- recrystallized from methanol
- reagent grade, dried at 120°C before weighing
- Redistilled.
Estimated Errors:
Ambient temperature: ±0.05°C
Mass concentration (m/v) (1): ±1%
References
1 Weast, R. C.; CRC Handbook of Chemistry and Physics, 59th Edition; CRC Press, 1978, pp D299-D300.
Experimental Values:
Solubility of Naphthalene in Aqueous Sodium Chloride
| T (°C) | x1 | MR1 (g1/100 g2) | MR2 (g/kg) | Cm1 (g/L) |
|---|---|---|---|---|
| 25.0 | 4.27 x 10-6 | 3.01 x 10-3 | 12.4 | 2.37 x 10-4 |
| 25.0 | 3.61 x 10-6 | 2.52 x 10-3 | 25.31 | 2.00 x 10-4 |
| 25.0 | 3.64 x 10-6 | 2.53 x 10-3 | 30.59 | 2.02 x 10-4 |
| 25.0 | 3.02 x 10-6 | 2.09 x 10-3 | 43.7 | 1.68 x 10-4 |
| 25.0 | 2.48 x 10-6 | 1.69 x 10-3 | 61.63 | 1.38 x 10-4 |
(a) Calculated by compilers using density and other physical data for NaCl solutions from ref 1.
