Which is NOT true for isoelectric and isoionic pH?

Question

Quizplus · Accepted Answer

Isoelectric pH is the pH at which the average charge of the polyprotic acid is zero or neutral. Isoionic pH is the pH of the pure, neutral, polyprotic acid. The equation given in option C is incorrect and the correct equation is [H+] = (Kw/[OH-])^(1/2) or [H+] = (Kw[Ci]/[COH-])^(1/2), where Kw is the ion-product constant of water, [OH-] is the hydroxide ion concentration, and [Ci] and [COH-] are the initial concentrations of the ionized and unionized forms of the acid, respectively. Option D gives the correct formula for the pH at the isoelectric point. Option E provides an incomplete equation, where F should refer to the formal concentration of the weak acid divided by the sum of all the formal concentrations of the acid species.

Which Is NOT True for Isoelectric and Isoionic PH