Spectrophotometric determination of acidity constants of salicylaldoxime in aqueous solution at 25 degrees C and ionic strength of 0.5 M controlled with NaCl

摘要

The equilibrium constants of salicylaldoxime in water at 25 degrees C, 0.5 M of ionic strength with NaCl and concentration of 1 x 10(-4) M were determined spectrophotometrically. The spectral data were processed using SQUAD program. The salicylaldoxime in acid medium has the value of pK(a1) = 1.224 +/- 0.027. In alkaline medium the salicylaldoxime has the values of pK(a2) = 8.551 +/- 0.024 and pK(a3) = 11.728 0.016. (c) 2006 Elsevier B.V. All rights reserved.