Table 3: Effect of varying solvent composition on the rate of perborate oxidation of 5-oxoacids at 313 ± 0.1 K. {[Substrate] = 0.01 mol dm−3; [perborate] = 0.001 mol dm−3; [H2SO4] = 2.0 mol mol−3}.

ACOH-H2O (v/v, %) ( )b
p-OCH3p-CH3p-C6H5−Hp-Clp-Brm-NO2

30 : 70 (53.18)63.89.508.677.602.381.971.18
40 : 60 (46.48)115.213.1011.869.603.102.121.29
50 : 50 (39.78)191.826.8718.7312.804.273.621.50
60 : 40 (33.08)58644.7031.0115.907.204.891.75
70 : 30 (26.38)1751162.971.2338.3012.807.612.69

Values of dielectric constant of the media are given in parentheses; bmean of duplicate experiments.