Response to “Comment on ‘The nonmonotonic concentration dependence of the mean activity coefficient of electrolytes is a result of a balance between solvation and ion–ion correlations’” [J. Chem. Phys. 134, 157101 (2011)]

Abstract

The nonmonotonic concentration dependence of the mean activity coefficient of electrolytes is a result of a balance between solvation and ion-ion correlations

Analysis of Some Electrolyte Models Including Their Ability to Predict the Activity Coefficients of Individual Ions

“…II+IW Theory. Valiskóet al [14][15][16][17]29 proposed the II+IW theory in which they split the excess chemical potential into two parts:…”

Activity coefficients of individual ions in LaCl3from the II+IW theory

“…A few notable exceptions are the papers of Abbas et al [5] and Inchekel et al [20]. In 2010, we proposed the II+IW theory [21][22][23][24][25] in which we split the excess chemical potential into two components…”

“…We criticized the concept of the "solvated radius" in our previous papers [21][22][23][24][25] and pointed out that important configurations corresponding to cations and anions in contact are excluded from the statistical sample with this artificial concept. The enlarged solvated radius is primarily useful when we talk about the interactions of ions with water.…”

Simple Theory of Ionic Activity in Concentrated Electrolytes

“…The field has recently come full circle, as Vincze et al [30] discovered that adding the Born energy could reverse this trend and bring hard-sphere simulations in line with experimental data. More sophisticated "molecular DH theories" including dielectric response have since emerged [31,32], but still no formula of comparable simplicity and ease of interpretation as DH, with the notable exception of Fraenkel's "smaller ion shell" (SIS) extension of DH [33][34][35][36][37], which approximates packing constraints in the screening cloud for sizedissimilar ions at moderate dilution.…”