IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures. Page: 54
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W. E. ACREE, JR.
Estimated Error:
Temperature: 0.2 (estimated by compiler).
c1: 4% (relative error, estimated by compiler).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 91J. Bradil, J. Malek, and V. Bazant,
[65-85-0] Chem. Prumysl 20, 117 (1970).
(2) 1-Butanol; C4H100;
[71-36-3]
Variables: Prepared by:
Temperature W. E. Acree, Jr.
Experimental Values
T/K x2a x1b
273.2 0.9355 0.0645
290.2 0.8915 0.1085
298.2 0.8596 0.1404
323.6 0.7545 0.2455
333.9 0.6824 0.3176
348.4 0.6147 0.3853
363.2 0.3878 0.6122
x2: mole fraction of component 2 in the saturated solution.
bx: mole fraction solubility of the solute. Solubility data were reported in
terms of grams of dissolved solute per 100 g of solution. Mole fraction
solubilities calculated by the compiler.
Auxiliary Information
Method/Apparatus/Procedure:
Excess solute and solvent and were placed in a flask and equilibrated at
constant temperature with stirring. After 90 min the stirring was discontinued,
and the solution was allowed to stand for 30 min to allow the undissolved solid
to settle to the bottom of the flask. An aliquot of the saturated solution was
removed by pipette fitted with a filtering device. The mass of the aliquot was
determined by weighing. The concentration of the dissolved solute was
determined by titration using sodium hydroxide, with phenolphthalein being
the endpoint indicator.
Source and Purity of Chemicals:
(1) Purity not given, Argon, Lodz, Poland, no purification details were
provided.
(2) Purity not given, Spolana, Neratovice, Czechoslovakia, was distilled before
use.
Estimated Error:
Temperature: 0.1 K.
x1: 1% (relative error).
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) 2-Methyl- 1-propanol;
C4HoO; [78-83-1]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.Experimental Values
a b
x2 1b
0.8476 0.1524
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.
Estimated Error:
Temperature: 0.2 K.
xl: 3% (relative error).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 76M. K. Chantooni and I. M. Kolthoff,
[65-85-0] Anal. Chem. 51, 133 (1979).
(2) 2-Methyl-2-propanol;
C4H100oO; [75-65-0]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
The measured solubility was reported to be 2.50 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, was dried in vacuo at 383
K before use.
(2) White Label, Eastman Kodak Chemical Company, Rochester, USA,
shaken with calcium hydride and distilled before use.
Estimated Error:
Temperature: 0.1 K (estimated by compiler).
c1: 2% (relative error, estimated by compiler).J. Phys. Chem. Ref. Data, Vol. 42, No. 3, 2013
033103-54
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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/m1/54/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.