Temperature dependence of .DELTA.-Cp.deg. for the self-ionization of methanol and for the acid dissociation of benzoic acid in methanol

1970 ◽  
Vol 74 (4) ◽  
pp. 696-701 ◽  
Author(s):  
Constance S. Leung ◽  
Ernest Grunwald
Keyword(s):  
Benzoic Acid ◽  
Temperature Dependence ◽  
The Self ◽  
Acid Dissociation

Temperature dependence of the self-broadening coefficients of ethane

2008 ◽  
Vol 249 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Linh Nguyen ◽  
Ghislain Blanquet ◽  
Jean Vander Auwera ◽  
Muriel Lepère
Keyword(s):  
Temperature Dependence ◽  
The Self

Nuclear magnetic resonance studies. X. Determination of the thermodynamic parameters of the self-association of tricyclic aromatic aldehydes in solution

1967 ◽  
Vol 45 (3) ◽  
pp. 213-219 ◽  
Author(s):  
Gurudata ◽  
R. E. Klinck ◽  
J. B. Stothers
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Thermodynamic Parameters ◽  
Aromatic Aldehydes ◽  
The Self ◽  
Kcal Mole ◽  
Magnetic Resonance Studies ◽  
Self Association

The temperature dependence of the formyl proton shieldings of 9-anthraldehyde and 9-phenanthraldehyde in chloroform solutions has been measured. Four concentrations in the range 0.5–5.0 mole % were examined over the temperature interval − 60 to + 90 °C. From these results, the enthalpies and entropies of formation have been estimated for the complex formed by the self-association of two aldehyde molecules. The calculations indicate the ΔH and ΔS values to be − 1.9 ± 0.3 kcal/mole and − 6 ± 1 e.u., respectively. These results are compared with other available data.

scholarly journals Concentration effect of Sodium Chloride Salt on Benzoic Acid Solubility and Dissociation into Water at 298 K Temperature

2021 ◽  
pp. 47-52
Author(s):  
Shiv Prakash Mishra
Keyword(s):  
Sodium Chloride ◽  
Ionic Strength ◽  
Benzoic Acid ◽  
Dissociation Constant ◽  
Acid Dissociation ◽  
Concentration Effect ◽  
Chloride Salt ◽  
Acid Dissociation Constant ◽  
Basic Solution ◽  
Acid Solubility

In article, we have been reported the study of a concentration effect of sodium chloride (NaCl) salt on benzoic acid solubility and its dissociation in water at 298 K temperature. At this temperature the benzoic acid solubility into water and their dissociation value for six samples in range of 0.00, 0.05, 0.10, 0.30, 0.40 and 0.50 M. Each of these different ionic strength or concentration of sodium chloride is analyzed by titrimetrically against of 0.05 M sodium hydroxide (NaOH) basic solution. The pH of each solution is measured well by using of calibrated pH-meter. Observation reveals that the value of pH of benzoic acid into water at applying temperature is may inversely related with concentration of NaCl. Graphically, the value of ionic strength (I) of that benzoic acid is plotted versus with dissociation constant (Kc) of acid into water at specific 298 K temperature. The value of benzoic acid dissociation constant for given each six concentration of NaCl is found to be -4.169, -4.045, -3.993, -3.885, -3.848 and -3.788, respectively.

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