Influence of ionic association on the B coefficient of the Jones–Dole equation for NaI in water–t-butyl alcohol mixtures at 26 °C

Abstract

Values of the B coefficient of the viscosity of the Jones-Dole equation are reported for sodium iodide in the water-t-butyl alcohol system up to 90 mol % t-butyl alcohol at 26 "C. The calculation of the theoretical A coefficient of the Jones-Dole equation needs the ionic limiting conductivity data. The conductivity measurements of Bu,NI and NaBPh, solutions in water-tbutyl alcohol mixtures at 26°C were performed in order to divide the conductivity for NaI, known from our earlier investigations, into ionic contributions. The division is based on the assumption of Fuoss et al. that A,(Bu,N+) = 0.5 19A,(Bu,NBPh,).It was found that the Jones-Dole equation was obeyed by all solutions in the investigated range of NaI concentration, i.e. the D coefficient was equal to zero. The conductivity data showed th8t NaI was associated in solutions with more than 20 mol % of t-butyl alcohol. Thus, the ionic association was taken into consideration in calculating the values of Bi and B, coefficients, referring to the ion-solvent and ion-pair-solvent interactions, respectively. The ion-solvent interactions (Bi) was higher than those resulting from Bcoefficient values without correction.

The curious effect of potassium fluoride on glycerol carbonate. How salts can influence the structuredness of organic solvents

“…This equation is specifically targeted to fit cases where the salt concentration is relatively high, c ≥ 0.1 M, and ion pair association is non negligible [23], whereas when c < 0.1 M the higher order term Dc 2 is usually overlooked [26][27][28][29][30].…”

“…(1)), that describes the variation of the solution viscosity η as a function of the solute concentration c [22], by including two terms that take into account the effect of free ion-solvent and ion pair-solvent interactions [23,24]:…”

Correlation of Viscosity Parameters and Enthalpy of Solutions of Electrolytes in Water-Organic Solvents

“…Table 5 The parameters of linearity of the dependence B = f (AH:) for NaI-water-TBA system within various composition ranges ofmixed solvent; r-the correlation coefficient, t-the significance test of the r. Table 6 Mean activation quantities for viscous flow of the NaI-water-TBA system at 26°C. The data for calculation were taken from paper (9). and where a is the parameter of Root's equation.…”

Electrical Conductances of Tetraphenylphosphonium and Tetraphenylboride Salts in C1 to C4 Alcohols

“…1,2 In our study of the reactivities of e swith ions in water/alcohol mixed solvents, [3][4][5] the conductances of ionic solutes were also measured to approximate the mutual diffusion coefficients of the reactants (e s -+ ion) in a solvent. Both reactivity of e sand the mobilities of e s -6 and ions [7][8][9][10][11][12] in solvents are affected by the solvent structure.…”