
%0 Journal Article
%A Samani, Faradj K. 
%A Capewell, Stephen G. 
%A Sipos, Pal M. 
%A May, Peter M. 
%A Hefter, Glenn 
%T Ionization of Water in Concentrated Potassium Halide Media
%J Australian Journal of Chemistry
%D 2000/07/27
%V 53
%N 5
%P 369-373
%K Potentiometry; ionic product; water dissociation; potassium ion; chloride; bromide; iodide.
%R https://doi.org/10.1071/CH00049
%U https://www.publish.csiro.au/paper/CH00049 
%X The ionic product of water, pKw = &#8211;log&#91;H+&#93;&#91;OH&#8211;&#93;, has been determined as a function of ionic strength (I ) in concentrated aqueous solutions of KCl, KBr and KI at 25&#x02DA;C by high-precision glass electrode potentiometric titrations. The pKw values obtained are in excellent agreement with, but generally more precise than, literature data. At I &#62; 1 M the pKw values increase smoothly and show systematic differences in the order KCl &#60; KBr &#60; KI, consistent with the decreasing H+-acceptor ability of the medium anions. Analogous behaviour is observed in MCl solutions, with pKw values varying in the order NaCl &#60; KCl &#60; CsCl. Formation constants of MOH0 ion pairs derived from these data are consistent with literature values. 
