POTENTIOMETRIC STUDY OF THE PROTONATION AND DISTRIBUTION EQUILIBRIA OF 2-CHLOROPHENOL IN NACL MEDIUM AT 25-DEGREES-C - CONSTRUCTION OF A THERMODYNAMIC MODEL

The potentiometric determination of the protonation constant of 2-chlo rophenol in NaCl media at different ionic strengths and its distributi on coefficient between these media and two organic solvents at 25 degr ees C are presented. An automated potentiometric system was used, and the determination of the constants was carried out using both graphica l and numerical methods. A thermodynamic model using the modified Brom ley methodology has been constructed for the prediction of protonation constants and distribution coefficients in NaCl media. The relevance of this study to the development of supported liquid membrane recovery systems is discussed.