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Mécanisme des réactions du chlorite et du dioxyde de chlore: 5. Cinétique de la réaction chlorite-bromure

par Schmitz, Guy ;Rooze, Henri
Référence Canadian journal of chemistry, 65, page (497)
Publication Publié, 1987

Article révisé par les pairs

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Résumé :

In acidic solutions of chlorite and bromide two processes occur simultaneously, the disproportionation of chlorite and an autocatalytic reaction leading to a rapid production of C102. The unusual features of this reaction are described. In this complex system the rate of HClO2+ Br-+ H++ HClO + HBrO cannot be measured. It can be, however, with added ortho-tolidine to remove the HBrO and HClO. We obtained r = k [[]HClO2][[]Br-] [[]H+] with k = 1.48 × 10-2M-1at 25°C. Without added ortho-tolidine this reaction initiates the autocatalytic reaction for which we suggest a kinetic scheme.