Thermodynamics of the Association Reaction of RbBr in Binary Mixtures of 2-Butanol and Water from 288.15 to 308.15 K

Vesna Sokol,* Renato Tomaš and Ivo Tominić

Faculty of Chemistry and Technology, University of Split, N. Tesle 10, 21000 Split, Croatia.
* Corresponding author: E-mail:

Molar conductivities of dilute solutions of rubidium bromide in binary mixtures of 2-butanol and water were measured in the temperature range from 288.15 to 308.15 K at 5 K intervals. The limiting molar conductivity ( Λo) and association constant (KA) were determined by treating experimental data with the Lee-Wheaton conductivity equation. Thermodynamic quantities for the ion-association reaction were derived from the temperature dependence of KA. The obtained results provide information on ion-ion and ion-solvent interactions.

Keywords: Rubidium bromide, 2-butanol + water mixtures, association to ion-pairs, thermodynamic quantities