selecttheoneofthefollowingstatementsthatisnot correct. a. if the pka of a weak acid is 4.0, 50% of the molecules will be in the dissociated state when the ph of the surrounding environment is 4.0. b. a weak acid with a pka of 4.0 will be a more effective buffer at ph 3.8 than at ph 5.7. c. at a ph equal to its pi a polypeptide carries no charged groups. d. strong acids and bases are so named because they undergo complete dissociation when dissolved in water. e. the pka of an ionizable group can be influenced by the physical and chemical properties of its surrounding environment.
