Ion‐Solvent Interaction of Biunivalent Electrolytes in Dioxane‐Water Mixtures from Conductivity Data at Different Temperatures

Abstract

This paper presents the conductivity measurements for some alkaline earth metal salts MgCl2, MgBr2, Mg(NO3)2, CaCl2, CaBr2 and Ca(NO3)2 by which the ion‐solvent interactions are reported in the concentration range in dioxane‐water mixtures at mass fraction of 0, 3, 10, 20 and 30% at 30°, 35°, 40° and 45°C ± 0.01. The conductance data were analyzed for the limiting molar conductivity, Ao, by the Fuoss‐Edelson conductivity equation for the 2:1 unsymmetrical electrolytes. The results were discussed in terms of the solute‐solvent interaction from the temperature coefficient of Walden product, Λoη of the electrolyte solutions. Moreover, Λoη was found to exhibit a linear relationship with the dielectric constant, ϵ, of the dioxane‐water mixtures. The study gives information regarding the ion‐solvent interactions from the mobilities and Walden product of the ions in the solvent. The ions appear to interact appreciably and the ion‐solvent interaction tends to increase in the order Ca > Mg for the same anion while for the anions, the trend decreases in the order Cl− < Br− < No−3.

Ion Association and Solvation Behaviour of Nickel(II) Complexes in Binary Mixtures of DMSO-H2O at Different Temperatures

“…The molar conductance (Λ) for studied solution system has been calculated using the following equation [11]:…”

KCl-Induced Phase Separation of 1,4-Dioxane + Water Mixtures Studied by Electrical Conductivity and Refractive Index

“…Going from the water-rich domain to the dioxane-rich domain, the potassium chloride (KCl) passes from a highly soluble strong electrolyte to a scarcely soluble weak electrolyte when association, pairing, and complexing phenomena are accentuated. [1][2][3][4][23][24][25][26][27][28][29] To fit the experimental data, eq 3 was used. The amplitude, B, the reduced temperature, t, and the exponent, β, were free.…”

“…23 Ion-solvent and solvent-solvent interactions have been investigated. 24,25 In fact, some recent structural studies show that the dioxane and water, both proton acceptors, will cause a significant degree of H bonding, leading to strong correlation between the molecules. [26][27][28][29][30] When the concentration of an electrolyte increases, a phase separation in the ternary system DWKCl is often observed.…”

“…Also, the study of different physicochemical properties in all of the domains of compositions shows the existence of different regions with distinct behaviors . Ion−solvent and solvent−solvent interactions have been investigated. , In fact, some recent structural studies show that the dioxane and water, both proton acceptors, will cause a significant degree of H bonding, leading to strong correlation between the molecules. − When the concentration of an electrolyte increases, a phase separation in the ternary system DWKCl is often observed.…”

The Audio Frequency Conductance Study of Some Metal Succinate Salts in Aqueous Medium at Different Temperatures (Part I: Magnesium, Manganese (II), Barium and Copper Succinates)

“…Also, it is well established that the extent of association of a series of electrolytes in di�erent solvents is speci�c for any ion-solvent combination, rather than being dielectric constant dependent. Information on ion-ion and ion-solvent and interactions can be obtained from conductivity measurement [1][2][3][4]. In a series of conductance studies, there have been numerous investigations of association behavior of 1 : 1 electrolytes in aqueous and binary mixed solvents.…”