The Debye-Hückel theory is probably the most widely used option for counting electrostatic forces in thermodynamic models. This work investigates effects of two important parameters – size ions and relative static permittivity solution. Three different activity coefficient models are analyzed compared 14 salt systems order to have a more complete picture capabilities limitations theory. three b...

using the mixed solvents, (water +ethanol + propanol), the solubility of cdf2 was determined byevaporating method at 25° c. the results showed that the sollbility, s, of cdf2 decreases bydecreasing the dielectric constant of the mixed solvent .once the solubility of cdf2 was determined,the concentration solubility product, ksp(c)=4s3, was calculated .furthermore ,by estimating the meanactivity ...

Bond Fukui functions and matrices are introduced for ab initio levels of theory using a Mulliken atoms in molecules model. It is shown how these indices may be obtained from first-order density matrix derivatives without need for going to second-order density matrices as in a previous work. The importance of taking into account the nonorthogonality of the basis in ab initio calculations is show...