STUDIES ON THE KINETIC-BEHAVIOR OF CR(VI) IN THE REACTION BETWEEN HYDROGEN-PEROXIDE AND IODIDE

The kinetic behaviour of Cr(VI) in the reaction between I- and H2O2 in dilute H2SO4 medium was investigated. It is found that Cr(VI) does no t act as a catalyst of reaction between I- and H2O2 but act directly a s a oxidizing agent of I-. A method for calculating the reaction order is also proposed. It is unnecessary to know the concentration of reac tant when this method is used. A kinetic method for the simultaneous d etermination of Cr(VI) and Mo(VI) is proposed. The linear ranges of de termination are 30 similar to 300 ng/mL for Cr(VI) and 2 similar to 20 ng/mL for Mo(VI), respectively.