Components:
(1) Naphthalene,
C10H8; [91-20-3]
NIST WebBook
(2) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Schwarz, F. P.; J. Chem. Eng. Data. 1977, 22, 273-7.
Variables:
Ambient temperature: 8.4 - 31.8 °C
Prepared by:
Method/Apparatus/Procedure:
Two methods were used.
At 25°C the solubility of (1) in (2) was determined from UV absorption measurements and was used as a standard at other temperatures. At other temperatures the spectrofluorimetry method was used.
The sealed fluorescence cells contained 5 mL of the aqueous solution and an excess of (1) were rotated at least 72 h in a water bath, then removed, quickly wiped dry and placed in the fluorimeter.
Source and Purity of Materials:
- source not specified; better than 99.9 mole%, by glc; used as received.
- distilled over KMnO4 and Na OH and passed through a Sephadex column.
Estimated Errors:
Ambient temperature: ±0.1°C
Mass concentration (m/v) (1): see above
Experimental Values:
Solubility of naphthalene in water
| T (°C) | C1 (mol/dm3) | x1a | MR1 (g1/100 g sln)a |
|---|---|---|---|
| 8.4 | 1.40 x 10-4 | 2.52 x 10-6 | 1.79 x 10-3 |
| 11.1 | 1.49 x 10-4 | 2.68 x 10-6 | 1.91 x 10-3 |
| 14.0 | 1.66 x 10-4 | 2.99 x 10-6 | 2.13 x 10-3 |
| 17.5 | 1.88 x 10-4 | 3.39 x 10-6 | 2.41 x 10-3 |
| 20.2 | 2.07 x 10-4 | 3.73 x 10-6 | 2.65 x 10-3 |
| 23.2 | 2.22 x 10-4 | 4.00 x 10-6 | 2.85 x 10-3 |
| 25.0 | 2.36 x 10-4 | 4.25 x 10-6 | 3.03 x 10-3 |
| 26.3 | 2.48 x 10-4 | 4.47 x 10-6 | 3.18 x 10-3 |
| 29.2 | 2.68 x 10-4 | 4.83 x 10-6 | 3.44 x 10-3 |
| 31.8 | 2.83 x 10-4 | 5.10 x 10-6 | 3.63 x 10-3 |
(a) These values were calculated by the compiler.
