Health & Environmental Research Online (HERO)


Print Feedback Export to File
7568829 
Journal Article 
KINETICS AND MECHANISM OF OXIDATION OF CARBOHYDRAZIDE BY CHLORAMINE-T AND BROMAMINE-T IN ACID AND BUFFERED AQUEOUS-MEDIA 
Gowda, BT; Pardhasaradhi, V; Ramachandra, P 
1991 
Yes 
Journal of the Indian Chemical Society
ISSN: 0019-4522 
68 
4 
220-225 
WOS:A1991GH56500010 
Kinetics of oxidation of carbohydrazide (CH) by chloramine-T (CAT) and bromanmine-T (BAT) have been investigated in aqueous medium under varying conditions. The kinetics of reactions in aqueous perchloric acid show first order in [oxidant] and fractional order in [CH]. But the rate dependences in [H+] are concentration dependent. At low [HClO4], oxidation by both CAT and BAT shows inverse fractional order in [H+], and at [HClO4] > 0.005 mol dm-3, the rate shows zero to fractional order In buffered media, the reactions are first order in [oxidant] and fractional to first order in [CH], but are independent of pH. Mechanisms consistent with the observed results have been considered and the related rate laws deduced. Coefficients of the rate-limiting steps and the corresponding activation parameters are also calculated.