IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures. Page: 37
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IUPAC-NIST SOLUBILITY DATA SERIES. 99
Auxiliary Information
Method/Apparatus/Procedure:
Constant-temperature bath, Soxhlet thimble, conical flask, and analytical
balance.
Excess solute and solvent were placed in a conical flask and allowed to
equilibrate for several days at constant temperature. Attainment of equilibrium
was verified by several repetitive measurements and by approaching
equilibrium from supersaturation. Weighed aliquots of saturated solutions
were removed and titrated with a standardized sodium hydroxide solution
(carbonate free) using a pH meter. The endpoint of the titration was determined
by computing the second derivative in the pH versus volume of sodium
hydroxide added.
Source and Purity of Chemicals:
(1) Purity not given, Chemical source not specified, was recrystallized several
times from aqueous-ethanol mixture, and then dried under vacuum over
phosphorous pentoxide.
(2) Practical grade, Chemical source not specified, stored over sodium
hydroxide pellets for 24 h, and then passed through 2 x 70-cm
chromatographic adsorption columns containing activated alumina. After this
treatment, the purified solvent was stored over copper in a nitrogen
atmosphere.
Estimated Error:
Temperature: 0.02 K.
xl: 1.0% (relative error).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 65A. F. Lagalante, A. Abdulagatov, and
[65-85-0] T. J. Bruno, J. Chem. Eng. Data 47, 47
(2) Methyl nonafluorobutyl ether; (2002).
C5H3F90; [163702-07-6]
Variables: Prepared by:
Temperature W. E. Acree, Jr.
Experimental Values (Interpolated Values)
T/K x2a x1b
259.7 0.9999 0.000138
268.2 0.9998 0.000172
283.2 0.9997 0.000272
298.2 0.9994 0.000560
313.3 0.9989 0.00110
328.2 0.9976 0.00235
ax2: mole fraction of component 2 in the saturated solution.
bxl: mole fraction solubility of the solute.
Auxiliary Information
Method/Apparatus/Procedure:
UV/visible spectrophotometer.
Solubilities were determined by supersaturating the solvent with naphthalene
and measuring the amount of dissolved solute using a spectroscopic method.
Aliquots of the saturated solution were pipetted into a volumetric flask, and
diluted with acetonitrile. If necessary, the sample was further diluted to bring
the measured absorbance to within the linear range of the absorbance versus
calibration curve obtained from absorbance measurements on solutions of
known naphthalene concentration. Absorbance measurements recorded at
272 nm.Source and Purity of Chemicals:
(1) Purity and Chemical source were not given, was used as received.
(2) 99%, Name of commercial supplier was not given, used as received.
Estimated Error:
Temperature: 0.1 K.
x1: 1.0% (relative error).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 65A. F. Lagalante, A. Abdulagatov, and
[65-85-0] T. J. Bruno, J. Chem. Eng. Data 47, 47
(2) Ethyl nonafluorobutyl ether; (2002).
C6H5F90; [163702-05-4]
Variables: Prepared by:
Temperature W. E. Acree, Jr.
Experimental Values (Interpolated)
T/K X2a X1b
259.7 0.9997 0.000282
268.2 0.9997 0.000297
283.2 0.9995 0.000459
298.2 0.9991 0.000857
313.3 0.9987 0.00133
328.2 0.9976 0.00242
343.2 0.9954 0.00463
ax2: mole fraction of component 2 in the saturated solution.
bxl: mole fraction solubility of the solute.
Auxiliary Information
Method/Apparatus/Procedure:
UV/visible spectrophotometer.
Solubilities were determinedby supersaturating the solvent with naphthalene and
measuring the amount of dissolved solute using a spectroscopic method. Aliquots
of the saturated solution were pipetted into a volumetric flask, and diluted with
acetonitrile. If necessary, the sample was further diluted to bring the measured
absorbance to within the linear range of the absorbance versus calibration curve
obtained from absorbance measurements on solutions of known naphthalene
concentration. Absorbance measurements recorded at 272 nm.
Source and Purity of Chemicals:
(1) Purity and Chemical source were not given, used as received.
(2) 99%, Name of commercial supplier was not given, used as received.
Estimated Error:
Temperature: 0.1 K.
x1: 1.0% (relative error).
2.6. Benzoic acid solubility data in haloalkanes,
haloalkenes, and haloaromatic hydrocarbons
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) Trichloromethane; CHC13;
[67-66-3]
Variables: Prepared by:T/K = 298.15 W. E. Acree, Jr.
J. Phys. Chem. Ref. Data, Vol. 42, No. 3, 2013
033103-37
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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/m1/37/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.