If Equal Reactivity Valid Why Deviations? Low Conversion Region Flory proposed Dramatic changes in polarity of the medium(-OH and-co H go to co R) .Polarity changes may change rate constant And/or H-bonding may have different order of reaction Remember, in self-catalyzed HA is co H and so A NOT constant IHA] and[H+] concentration units NOT good estimates of activity in non-aqueous need activity