cidity of Substituted Phenols (All groups do Part I) Phenols are mildly acidic. The pKa for a substituted phenol depends on several factors. 1) The type of substituent that is attached to the ring. (electron releasing or withdrawing) 2) The location of the substituent relative to the ~OH group. 3) Substituents that can donate or withdraw by resonance usually have a greater impact than those that donate or withdraw by induction. a) Rank the following group of substituted phenols from most acidic to least acidic. b) Explain your choice and include in the explanation whether the substituent is donating or withdrawing. Also, include whether the substituent is donating or withdrawing primarily by induction or resonance. HINT: Think about the resonance structures for the phenoxide anion.