IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures. Page: 72
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W. E. ACREE, JR.
Experimental Values
T/K
294.75
298.75
301.05
302.15
306.35
310.05
312.15
316.55
319.35
323.35
325.65
329.05
331.85
336.45
340.05
343.35
346.05
348.75
351.25
355.55
358.05
362.85
366.85
369.65b
ax2: mole fraction of component 2 in the saturated solution.
bx1: mole fraction solubility of the solute.
Auxiliary Information
Method/Apparatus/Procedure:
Jacketed solid-liquid equilibrium cell, analytical balance, magnetic stirring
system, temperature controlling system, and a laser monitoring system.
Solubilities were determined using a synthetic method. Weighed amounts of
solute and solvent were sealed in a jacketed equilibrium vessel, and the
temperature slowly increased until the solid phase completely disappeared.
The disappearance of the solid solute was detected by a laser monitoring
system. Measurements were repeated two or three times to check the
reproducibility.
Source and Purity of Chemicals:
(1) Analytical Reagent, Shanghai Chemical Reagent Company, China, used as
received.
(2) Analytical Reagent, Shanghai Chemical Reagent Company, used as
received.
Estimated Error:
Temperature: 0.05 K (estimated by compiler).
x1: 0.0005 or less.
Components: Original Measurements:
(1) Benzoic acid; C7H602; 83M. K. Chantooni and I. M. Kolthoff,
[65-85-0] J. Phys. Chem. 77, 527 (1973).
(2) N,N-Dimethylformamide;
C3H7NO; [64-19-7]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.x2
0.5357
0.5273
0.5224
0.5186
0.5119
0.5043
0.4996
0.4896
0.4824
0.4719
0.4662
0.4572
0.4480
0.4336
0.4226
0.4098
0.3985
0.3865
0.3757
0.3528
0.3395
0.3129
0.2874
0.2665J. Phys. Chem. Ref. Data, Vol. 42, No. 3, 2013
b
xl
0.4643
0.4727
0.4776
0.4814
0.4881
0.4957
0.5004
0.5104
0.5176
0.5281
0.5338
0.5428
0.5520
0.5664
0.5774
0.5902
0.6015
0.6135
0.6243
0.6472
0.6605
0.6871
0.7126
0.7335Experimental Values
The measured solubility was reported to be 5.35 mol dm-3.
The authors did not give the temperature at which the solubility
was measured. Based on the experimental description given in
an earlier paper [I. M. Kolthoff, J. J. Lingane, and W. Larson, J.
Am. Chem. Soc. 60, 2512 (1938)], the compiler believes the
temperature to be 298.15 K.
Auxiliary Information
Method/Apparatus/Procedure:
Very little experimental details were provided. Solubility was determined by
titrating a filtered aliquot of the saturated solution alkalimetrically in an
aqueous-ethanol mixture using phenolphthalein as the acid-base indicator.
Source and Purity of Chemicals:
(1) High purity, National Bureau of Standards, USA, no purification details
given.
(2) Purity not given, Chemical source not given, was shaken first with
phosphorous pentoxide and then with potassium hydroxide pellets. Solvent
was distilled shortly before use.
Estimated Error:
Temperature: 0.1 K (estimated by compiler).
c1: 2% (relative error, estimated by compiler).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 47A. Beerbower, P. L. Wu, and A.
[65-85-0] Martin, J. Pharm. Sci. 73, 179 (1984).
(2) N,N-Dimethylacetamide;
C4H9NO; [127-19-5]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
a b
x2 x1
0.4755 0.5245
ax2: mole fraction of component 2 in the saturated solution.
bxl: mole fraction solubility of the solute.
Auxiliary Information
Method/Apparatus/Procedure:
Constant-temperature bath and ultraviolet/visible spectrophotometer.
Excess solute and solvent were placed in screw-capped vials. The vials were
sealed and submerged in a constant-temperature water bath and shaken at 100
cycles/min for 24 h. After the 24 h equilibration period, the vial was removed,
wiped dry, and the contents analyzed. The solutions were transferred to a
syringe and filtered through a 0.1 pm pore size filter. The solutions were diluted
and the absorbances recorded at the maximum absorption wavelength of
benzoic acid. The solubility was determined at least six times.
Source and Purity of Chemicals:
(1) Purity not given, Chemical source not specified, no information provided
concerning purification.
(2) Spectrophotometric or ACS Reagent grade, Chemical source not specified,
redistilled before use.033103-72
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Acree, William E. (William Eugene). IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures., article, May 15, 2013; [College Park, Maryland]. (https://digital.library.unt.edu/ark:/67531/metadc181688/m1/72/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.