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

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Joel Tshuma, Georgina Alarcón-Angeles, Elia Palacios-Beas, Roberto Vargas-García, María Teresa Ramírez-Silva, Alberto Rojas-Hernández

Author Information

Joel Tshuma: Instituto Politécnico Nacional, ESIQIE, Departamento de Ingeniería Metalúrgica, C.P. 05700, México D.F., Mexico. jtshuma_66@yahoo.com.mx

PMID: 16875871 DOI: 10.1016/j.saa.2006.05.004

The equilibrium constants of salicylaldoxime in water at 25 degrees C, 0.5 M of ionic strength with NaCl and concentration of 1x10(-4) M were determined spectrophotometrically. The spectral data were processed using SQUAD program. The salicylaldoxime in acid medium has the value of pKa1=1.224+/-0.027. In alkaline medium the salicylaldoxime has the values of pKa2=8.551+/-0.024 and pKa3=11.728+/-0.016.

Hydrochloric Acid

Hydrogen-Ion Concentration

Kinetics

Osmolar Concentration

Oximes

Sodium Chloride

Solutions

Spectrophotometry, Ultraviolet

Temperature

Oximes

Solutions

salicylaldoxime

Sodium Chloride

Hydrochloric Acid

Journal Article Research Support, Non-U.S. Gov't

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