Potentiometric determination of pK(A) of organic bases in acetone by the application of coulometry.
A coulometric-potentiometric method for the determination of pK(A) values of organic bases in anhydrous acetone is described. The bases were titrated with protons obtained by anodic oxidation of hydrogen dissolved in palladium, in the presence of sodium perchlorate as the supporting electrolyte. A pair of glass electrodes was used for measuring directly the difference between the half-neutralization potentials of the standard and the base being studied. The pK(A) values obtained were close to those reported in the literature. The effect of the supporting electrolyte concentration on the pK(A) values of some of the bases was also studied.
Vajgand
V J
VJ
Faculty of Science, University of Belgrade, Belgrade, Yugoslavia.
Mihajlović
R P
RP
Dzudović
R M
RM