Spectrophotometric determination of acidity constants of salicylaldoxime in aqueous solution at 25 degrees C and ionic strength of 0.5 M controlled with NaCl.
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.
Tshuma
Joel
J
Instituto Politécnico Nacional, ESIQIE, Departamento de Ingeniería Metalúrgica, C.P. 05700, México D.F., Mexico. jtshuma_66@yahoo.com.mx
Alarcón-Angeles
Georgina
G
Palacios-Beas
Elia
E
Vargas-García
Roberto
R
Ramírez-Silva
María Teresa
MT
Rojas-Hernández
Alberto
A
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
D010091:Oximes; D012996:Solutions; C005704:salicylaldoxime; D012965:Sodium Chloride; D006851:Hydrochloric Acid