title: Spectrophotometric determination of acidity constants of salicylaldoxime in aqueous solution at 25 degrees C and ionic strength of 0.5 M controlled with NaCl.
abstract: 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.
authors.affiliation: Instituto Politécnico Nacional, ESIQIE, Departamento de Ingeniería Metalúrgica, C.P. 05700, México D.F., Mexico. jtshuma_66@yahoo.com.mx
authors.forename: Joel
authors.initials: J
authors.lastname: Tshuma
authors.forename: Georgina
authors.initials: G
authors.lastname: Alarcón-Angeles
authors.forename: Elia
authors.initials: E
authors.lastname: Palacios-Beas
authors.forename: Roberto
authors.initials: R
authors.lastname: Vargas-García
authors.forename: María Teresa
authors.initials: MT
authors.lastname: Ramírez-Silva
authors.forename: Alberto
authors.initials: A
authors.lastname: Rojas-Hernández
mesh_terms: D006851:Hydrochloric Acid / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009994:Osmolar Concentration; D010091:Oximes / Q000032:analysis* / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D010091:Oximes; D012996:Solutions; C005704:salicylaldoxime; D012965:Sodium Chloride; D006851:Hydrochloric Acid