par Schmitz, Guy 
;Rooze, Henri
Référence Canadian journal of chemistry, 64, 9, page (1747-1751)
Publication Publié, 1986
;Rooze, Henri Référence Canadian journal of chemistry, 64, 9, page (1747-1751)
Publication Publié, 1986
Article révisé par les pairs
| Résumé : | We have shown previously that oft/iotolidine greatly simplifies the kinetic study of redox reactions of chlorite by reacting with intermediate products and eliminating side reactions. The present study shows the validity of the method in the case of bromate reactions. For the bromate-bromide reaction it gives the classical fourth-order rate law with k = 1.54 M"3s-1 in perchloric acid solutions at 25°C and 1 M ionic strength, and an acidity constant of bromic acid of 2.9. This method is then used to study the reaction between bromate and chlorite, a complex reaction in the absence of ortho-tolidine. The rate law is d[BrO3-]/dt=k[BrO3-][HClO2][H+] with k = 0.83 + 0.76 [H+] in the same conditions. If [H+] = 0.1 M the apparent activation energy is 47.4 kJ/mol. |
