Table 2: Effect of varying [H2SO4] 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; HOAc-H2O = 1 : 1% (v/v)}.

[H2SO4] (mol dm−3) −Ho ( )a
p-OCH3p-CH3p-C6H5−Hp-Clp-Brm-NO2

0.51−0.1311.892.311.871.58
0.750.0729.934.383.282.88
1.010.2647.987.685.194.521.271.211.18
1.490.5695.9615.9812.678.842.321.981.26
2.010.84191.926.8719.2812.784.263.091.52
2.491.12287.947.9838.6925.597.195.162.57
3.001.38479.8134.379.8134.8512.797.283.97
4.011.851151287.8140.6357.5825.5816.897.69
2.012.012.02.002.01 2.02.00
1.31.01.01.01.11.11.0

Mean of duplicate experiments; bslopes of log k versus log [H2SO4]; cslopes of the Zucker-Hammett plots.