Figure 3. Relative rate for the formation of TNT-in the reaction of TNT with I1 as a function of the concentration of hexadecyltrimethylammonium bromide in aqueous solution at 25 OC. Initial concentrations of TNT and I1 were 2.5 X and 1 XM, respectively. factants. The enhanced rate was more pronounced with the cationic surfactant than the nonionic one (cf. 130 vs. 8). The critical micelle concentration of hexadecyltrimethylammonium bromide is ...