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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Naphthalene with Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Naphthalene; C10H8; [91-20-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Bohon, R.L.; Claussen, W.F., J. Am. Chem. Soc. 1951, 73, 1571-8.
Variables:
Temperature = 0 °C - 42.8 °C
Prepared By:
G.T. Hefter
Experimental Data:
(Notes on the Nomenclature)
Solubility of naphthalene in water
t/°C
10
3
* g
1
/100 g solution
g
1
/100 g soln. Note
10
6
* Mole Fraction x
1
0.0
1.37
a
1.92
0.4
1.37
a
1.92
0.5
1.38
a
1.94
0.9
1.46
a
2.05
1.9
1.50
a
2.11
9.4
1.96
a
2.75
10.0
1.94
a
2.72
14.9
2.34
a
3.29
15.9
2.46
a
3.45
19.3
2.80
a
3.93
25.0
3.44
b
a
4.83
b
25.6
3.58
a
5.03
30.1
4.30
a
6.04
30.2
4.39
a
6.16
35.2
5.45
a
7.65
36.0
5.48
a
7.69
42.8
7.35
a
10.3
Notes:
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 0.0344g(1)/L sln.
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:
(1) Allied Chemical & Dye Corp., purified by vacuum distillation.
(2) Air-free conductivity water, no other details given.
Estimated Errors:
Solubility: ± 0.5% relative
Temperature: ± 0.02°C