Original scientific paper

Ion-Association Reaction of H+ and Br- in (90 and 95 Mass per Cent) 1-Butanol-Water, and (90 and 95 Mass per Cent) 2-Methyl-2-Propanol-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

The molar conductivities of HBr in the 90 and 95 mass per cent 2-met- hyl-2-propanol-water and 1-butanol-water mixtures, respectively, were measured in the temperature range from 288.15 to 308. 15 K at 5 K intervals.
By means of the conductance equations after Fuoss-Hsia and Lee-Wheaton the limiting molar conductivity (Ao), association constant (KA) and the radius of the ion pair (R) were obtained from these data. The data for R differ considerably, so that KA and A0 were also calculated with the same equations under the condition that R = q (q is the Bjerrum critical distance). The influence of the dielectric constant on KA and Ao was established and discussed and comparison was made with analogous literature data for 2-butanol-water and tert. butanol-water mixtures. From the data for KA at different temperatures (under the conditionR = q) the standard thermodynamic quantities for association reaction of H+ and Br" were determined.

Keywords

Hrčak ID:

137324

URI

https://hrcak.srce.hr/137324

Publication date:

15.10.1991.

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