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Ionic association and the formation of triple ions of cesium bromide in binary mixture of butan-2-ol and water

Molar conductivity of cesium bromide in binary mixture of butan-2-ol and water with 90 mass. % alcohol content was measured at five temperatures in the range from 15 °C to 35 °C. Data were processed using conductivity models based on the Fuoss-Hsia equation. The limiting molar conductivity of electrolyte and the thermodynamic equilibrium constant for the ion-association reaction (KA) were derived at each temperature. Thermodynamic quantities of the association reaction, as well as the activation enthalpy of the ionic movement were derived at 25 °C. The limiting concentration for the triple ion formation was estimated. The formation of triple ions was investigated assuming equal equilibrium constants of triple cation and anion. The limiting molar conductivity of triple ions, the constant KT and the thermodynamic quantities of the triple ion formation were derived.

cesium bromide, butanol-2-ol + water mixture, ion pairs, triple ions, thermodynamic quantities

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