IUPAC-NIST Solubility Data Series. 99. Solubility of Benzoic Acid and Substituted Benzoic Acids in Both Neat Organic Solvents and Organic Solvent Mixtures. Page: 94
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W. E. ACREE, JR.
Components: Original Measurements:
(1) 2-Acetoxybenzoic acid; 12A. K. Charlton, C. R. Daniels, W. E.
C9H804; [50-78-2] Acree, Jr., and M. H. Abraham, J.
(2) 2-Propanol; C3H80; Solution Chem. 32, 1087 (2003).
[67-63-0]
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
X2a Xb
x2 x11
0.9477 0.05232
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, calorimetric thermometer, and an ultraviolet/
visible spectrophotometer.
Excess solute and solvent were placed in amber glass bottles 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. Aliquots of saturated solutions were
transferred through a coarse filter into tared volumetric flasks, weighed, and
diluted with methanol. Concentrations were determined by
spectrophotometric measurements at 272 nm.
Source and Purity of Chemicals:
(1) 99%, Aldrich Chemical Company, Milwaukee, WI, USA, was used as
received.
(2) 99+%, anhydrous, Aldrich Chemical Company, stored over molecular
sieves and distilled shortly before use.
Estimated Error:
Temperature: 0.1 K.
xl: 1.5% (relative error).
Components: Original Measurements:
(1) 2-Acetoxybenzoic acid; 92G. D. Maia and M. Giulietti, J. Chem.
C9H804; [50-78-2] Eng. Data 53, 256 (2008).
(2) 2-Propanol; C3HO0; [67-63-0]
Variables: Prepared by:
Temperature W. E. Acree, Jr.
Experimental Values
T/K x2a x1b281.6
291.8
304.1
312.9
316.1
320.4
322.70.987
0.968
0.937
0.909
0.898
0.882
0.8720.013
0.032
0.063
0.091
0.102
0.118
0.128T/K X2a X1b
325.8 0.857 0.143
327.7 0.847 0.153
330.2 0.833 0.167
ax2: mole fraction of component 2 in the saturated solution.
bxl: mole fraction solubility of the solute.
Auxiliary Information
Method/Apparatus/Procedure:
Circulating thermostated water bath, analytical balance, and drying oven.
Known amounts of solute and solvent were placed in the equilibrium vessel
which was connected to the thermostated water bath. The vessel was agitated at
750 rpm as temperature was increased and decreased. By regulating the bath
temperature, the authors were able to determine the temperature at which
complete dissolution occurred (heating mode) and the temperature at which the
first crystals formed (cooling mode).
Source and Purity of Chemicals:
(1) 99.5%, Anidrol Quimica, Diadema, Brazil, no purification details were
given.
(2) 99.9%, Synthon Chemicals, no purification details were given.
Estimated Error:
Temperature: 0.2 K (estimated by compiler).
xl: 3% (relative error, estimated by compiler).
Components: Original Measurements:
(1) 2-Acetoxybenzoic acid; 12A. K. Charlton, C. R. Daniels, W. E.
C9H804; [50-78-2] Acree, Jr., and M. H. Abraham, J.
(2) 1-Butanol; C4H100oO; [71-36-3] Solution Chem. 32, 1087 (2003).
Variables: Prepared by:
T/K = 298.15 W. E. Acree, Jr.
Experimental Values
a b
x2 x1
0.9538 0.04616
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, calorimetric thermometer, and an ultraviolet/
visible spectrophotometer.
Excess solute and solvent were placed in amber glass bottles 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. Aliquots of saturated solutions were
transferred through a coarse filter into tared volumetric flasks, weighed, and
diluted with methanol. Concentrations were determined by
spectrophotometric measurements at 272 nm.
Source and Purity of Chemicals:
(1) 99%, Aldrich Chemical Company, Milwaukee, WI, USA, was used as
received.
(2) 99.8+%, HPLC grade, Aldrich Chemical Company, stored over molecularsieves and distilled shortly before use.
J. Phys. Chem. Ref. Data, Vol. 42, No. 3, 2013
033103-94
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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/m1/94/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.