Revista de Química e Engenharia Química Aplicada

Kinetic Study of the Discoloration of Crystal Violet Dye in Sodium Hydroxide Medium

Latona Dayo Felix

The kinetics of the Discoloration of crystal violet in alkaline medium was investigated via pseudo-first order kinetics at λmax587 nm. The reaction was first order dependence on [CV] and [OH-]. A decrease in pseudo first-order rate constant with increase in ionic strength of the reaction mixture was observed. Activation parameters were calculated and a plausible association mechanism in agreement with the kinetic and spectroscopic results was provided. Spectrophotometric titration revealed 1:1 consumption of crystal violet to hydroxyl ion.