IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures. Page: 39
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IUPAC-NIST SOLUBILITY DATA SERIES. 99
Auxiliary Information
Method/Apparatus/Procedure:
Excess solute and solvent were placed in a glass flask which was kept revolving
on a wheel inn air thermostat for two days. After two days of equilibration, the
solution was filtered. To minimize absorption of the solute onto the filter paper,
a 100 ml portion of fresh saturated solution was first filtered through the paper
before filtering the sample to be analyzed. An aliquot of the filtrate was titrated
with barium hydroxide using phenolphthalein as the endpoint indictor. The
barium hydroxide titrant was previously standardized against a solution of
succinic acid.
Source and Purity of Chemicals:
(1) Purity not given, Chemical source not specified, no information provided
concerning purification.
(2) Purity not given, Chemical source not specified, no information provided
concerning purification.
Estimated Error:
Temperature: No information given.
x1: 3% (relative error, estimated by compiler).
Components: Original Measurements:
(1) Benzoic acid; C7H602; 66W. Herz and W. Rathmann, Z.
[65-85-0] Elektrochem. 19, 887 (1913).
(2) Trichloromethane; CHC13;
[67-66-3]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
The measured molar solubility was c1 = 1.477 mol dm-3.
Auxiliary Information
Method/Apparatus/Procedure:
Very little experimental details were provided. Excess solute and solvent were
shaken in a thermostat at 298 K. After equilibrium was reached and the solid
phase settled to the bottom of the container, an aliquot of the saturated clear
solution was removed by pipet. The concentration of the solute in the saturated
solution was determined by titration.
Source and Purity of Chemicals:
(1) Purity not given, Chemical source not given, no purification details were
provided.
(2) Purity not given, Chemical source not given, no purification details were
provided.
Estimated Error:
Temperature: No information was given.
c1: 4% (relative error, estimated by compiler).
Components: Original Measurements:
(1) Benzoic acid; C7H602, 57J. W. Marden and M. V. Dover, J.
[65-85-0] Am. Chem. Soc. 38, 1235 (1916).
(2) Trichloromethane; CHC13;
[67-66-3]
Variables: Prepared by:
T/K 298.15 W.E. Acree, Jr.Experimental Values
a b
x2 X1
0.727 0.273
ax2: mole fraction of component 2 in the saturated solution.
bxl: mole fraction solubility of the solute. Experimental solubility data were
given as grams of solute per 100 g of solvent. Mole fraction solubility was
calculated by the compiler.
Auxiliary Information
Method/Apparatus/Procedure:
Constant-temperature thermostat, analytical balance, and a steam bath.
Excess solute and solvent were placed in a bottle with ground glass stopper
which was protected by a coating of beeswax and rosin, over which was tied a
piece of rubber sheeting. The sealed mixture was shaken in a constant-
temperature thermostat for 8-20 h. An aliquot of the saturated solution was
withdrawn through a glass wool filter into a weighing pipet from which the
solutions were weighed directly into small glass evaporating dishes. The
solvent was removed on a steam bath, and the sample further dried in a sulfuric
acid desiccator. The solubility was calculated from the mass of the solid
residue and the mass of the saturated solution removed for analysis.
Source and Purity of Chemicals:
(1) Purity not given, Chemical source not given, no purification details were
provided.
(2) Purity not given, Chemical source not given, no purification details were
provided.
Estimated Error:
Temperature: 0.1 K.
x1: 10.0% (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) Tetrachloromethane; CC14;
[56-23-5]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
a b
x2 x1
0.9506 0.0494
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.J. Phys. Chem. Ref. Data, Vol. 42, No. 3, 2013
033103-39
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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/m1/39/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.