Original scientific paper

Ion-Association Reaction of H+ and Br- in (70, 80, 90 and 95 Mass per cent) 2-Butanol-Water Mixtures

I. Tominić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, 58000 Split, Teslina 10, Croatia, Yugoslavia
I. Mekjavić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, 58000 Split, Teslina 10, Croatia, Yugoslavia

Abstract

Molar conductivities of HBr in 70, 80, 90 and 95 mass per cent 2-butan- ol-water mixtures were measured in the temperature range from 288.15 to 308.15 K at 5 K intervals. The experimental values were analyzed by the conductance equations after Fuoss-Hsia and Lee-Wheaton. Values for the limiting molar conductivity (A0), obtained by both equations, agree well, better than the association constants (2£A), while the distance parameters (R) differ considerably. Both equations were used to calculate the association constants at different temperatures under the condition that R=q (q is the Bjerrum critical distance). These values were used to obtain standard thermodynamic quantities for the H+ and Br" ion association reaction. The values obtained were compared with the literature data for terL butanol-water mixtures. The mechanism of H+ ion transfer in the investigated mixtures was also discussed.

Keywords

Hrčak ID:

137366

URI

https://hrcak.srce.hr/137366

Publication date:

30.6.1991.

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