Reaction Kinetics Between (Hydroxyamino)acetic Acid and HNO2 in Perchloric Acid Solution

The reaction kinetics between HNO2 and (hydroxyamino)acetic acid (HAAA) in perchloric acid solution were determined by spectrophotometry. The rate equation is found to be -dc(HNO2)/dt＝kc0.87(HAAA) c2.11(H+)c0.51(ClO-4), where k＝(3.63±0.35) (mol/L)3.49/s at 1 ℃, Ea＝(72.6±3.0) kJ/mol. Effects of the concentration of HAAA, acidity, ionic strength and temperature on reduction rate of HNO2 were investigated. HNO2 can be rapidly reduced by HAAA under usual conditions. The reaction rate can be accelerated by increasing the concentration of HAAA, acidity, ionic strength and reaction temperature.