
TY  - JOUR
A1  - Samani, Faradj K. 
A1  - Capewell, Stephen G. 
A1  - Sipos, Pal M. 
A1  - May, Peter M. 
A1  - Hefter, Glenn 
T1  - Ionization of Water in Concentrated Potassium Halide Media
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2000
VL  - 53
IS  - 5
SP  - 369
EP  - 373
KW  - Potentiometry; ionic product; water dissociation; potassium ion; chloride; bromide; iodide.
UR  - https://doi.org/10.1071/CH00049 
N2  - 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. 
ER  -

