The Acid Ionization Constant of HOCl from 5 to 35°

1966 ◽  
Vol 70 (12) ◽  
pp. 3798-3805 ◽  
Author(s):  
J. Carrell Morris
Keyword(s):  
Ionization Constant ◽  
Acid Ionization Constant ◽  
Acid Ionization

The acidity constant of fluorene-9-carboxylic acid in aqueous solution. Determination of the pKa of a sparingly soluble substance

1993 ◽  
Vol 71 (2) ◽  
pp. 227-229 ◽  
Author(s):  
A. J. Kresge ◽  
I. G. Pojarlieff ◽  
E. M. Rubinstein
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Ionization Constant ◽  
Acid Group ◽  
Acidity Constant ◽  
Carboxylic Acid Group ◽  
Soluble Substance ◽  
Acid Ionization Constant ◽  
Acid Ionization

The acid ionization constant of the carboxylic acid group of fluorene-9-carboxylic acid in aqueous solution at 25 °C was determined to be pKa = 3.61, using a method based upon the increase in solubility of this sparingly soluble substance brought about by its ionization. This corrects an earlier considerably different value of this quantity determined by equating pKa with the pH measured at half-neutralization. The hazard inherent in the latter method when applied to sparingly soluble substances is discussed.

scholarly journals First acid ionization constant of the drinking water relevant chemical cyanuric acid from 5 to 35 °C

2018 ◽  
Vol 4 (10) ◽  
pp. 1522-1530 ◽  
Author(s):  
David G. Wahman
Keyword(s):  
Drinking Water ◽  
Cyanuric Acid ◽  
Ionization Constant ◽  
Acid Ionization Constant ◽  
Acid Ionization

The first acid ionization constant (K6) for cyanuric acid was determined from 5 to 35 °C where or and ΔH° = 33.4 ± 1.7 kJ mol−1.

scholarly journals Prediction of Thermodynamic and Structural Properties of Sulfamerazine and Sulfamethazine in Water Using DFT and ab Initio Methods

2018 ◽  
Vol 62 (1) ◽  
Author(s):  
Neda Hazhir ◽  
Farhoush Kiani ◽  
Hasan Tahermansouri ◽  
Saraei Ghorbani-Hasan Azade ◽  
Fardad Koohyar
Keyword(s):  
Ab Initio ◽  
Structural Properties ◽  
Density Functional ◽  
Ionization Constant ◽  
Intermolecular Hydrogen Bond ◽  
Research Work ◽  
Dft Methods ◽  
Polarized Continuum Model ◽  
Acid Ionization Constant ◽  
Acid Ionization

The acid-ionization constant (pK<sub>a</sub>) is an important physico-chemical property of molecules. In this research work, the ab initio and density functional theory (DFT) methods, in combination with the polarized continuum model (PCM), were used to calculate the acid-ionization constant of sulfamethazine (SMZ) and sulfamerazine (SMR) solved in water. For these molecules, the calculated pK<sub>a</sub> value is in relatively good agreement with the experimental one. Also, in these calculations some structural properties such as dihedral angle between the indicated atoms: D, bond lengths between the indicated atoms: d, Bohr radius: a˳, intermolecular hydrogen bond: IHB, and total atomic charge: au have been determined. These data can be used in nano drug modeling of sulfamethazine and sulfamerazine.

A calorimetric study of periodate species in aqueous solution

1968 ◽  
Vol 46 (16) ◽  
pp. 2679-2683 ◽  
Author(s):  
E. E. Mercer ◽  
D. T. Farrar
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Sodium Periodate ◽  
Ionization Constant ◽  
Periodic Acid ◽  
Heats Of Formation ◽  
Calorimetric Study ◽  
Kcal Mole ◽  
Acid Ionization Constant ◽  
Acid Ionization

Heats of several reactions involving sodium periodate, NaIO4(c), have been measured in an isothermal jacketed calorimeter. The apparent acid ionization constant of periodic acid was redetermined at an ionic strength of 0.13. From these data the following values for heats of formation at 25.00° have been calculated: NaIO4(c), −105.15 ± 0.30; IO4−(aq), −38.8 ± 0.4; H5IO6(aq), −188.9 ± 1.0; H4IO6−(aq), −186.3 ± 1.0 kcal/mole.

Sign in / Sign up

Export Citation Format

Share Document