Components:
(1) Naphthalene,
C10H8; [91-20-3]
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 - 42.8 °C
Prepared by:
Method/Apparatus/Procedure:
A round-bottomed flask containing about 4 mL of (1) and 400 mL of (2) 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, partialy 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:
- Allied Chemical & Dye Corp., purified by vacuum distillation.
- Air-free conductivity water, no other details given.
Estimated Errors:
Ambient temperature: ±0.02°C
Mass concentration (m/v) (1): ±0.5% relative
Experimental Values:
Solubility of naphthalene in water
| T (°C) | x1 | MR1 (g1/100 g2) |
|---|---|---|
| 0.0 | 1.92 x 10-6 | 1.37 x 10-3 |
| 4 x 10-1 | 1.92 x 10-6 | 1.37 x 10-3 |
| 5 x 10-1 | 1.94 x 10-6 | 1.38 x 10-3 |
| 9 x 10-1 | 2.05 x 10-6 | 1.46 x 10-3 |
| 1.9 | 2.11 x 10-6 | 1.50 x 10-3 |
| 9.4 | 2.75 x 10-6 | 1.96 x 10-3 |
| 10.0 | 2.72 x 10-6 | 1.94 x 10-3 |
| 14.9 | 3.29 x 10-6 | 2.34 x 10-3 |
| 15.9 | 3.45 x 10-6 | 2.46 x 10-3 |
| 19.3 | 3.93 x 10-6 | 2.80 x 10-3 |
| 25.0 | 4.83 x 10-6 | 3.44 x 10-3 |
| 25.6 | 5.03 x 10-6 | 3.58 x 10-3 |
| 30.1 | 6.04 x 10-6 | 4.30 x 10-3 |
| 30.2 | 6.16 x 10-6 | 4.39 x 10-3 |
| 35.2 | 7.65 x 10-6 | 5.45 x 10-3 |
| 36.0 | 7.69 x 10-6 | 5.48 x 10-3 |
| 42.8 | 1.03 x 10-5 | 7.35 x 10-3 |
(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' "extinctioin 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 paper as 0.0344 g(1)/L sln.
