22. Which of the following statements concerning titration is INCORRECT?
(A) During the titration of a weak acid with a strong base, the pH at the half-equivalence point is equal to the pKa of the acid.
(B) In complexometric titrations, the conditional formation constant of the metal-EDTA complex depends on the solution pH.
(C) Iodine acts as a strong oxidizing agent in acidic, neutral, and basic media and is commonly used as a primary standard without further purification.
(D) In the Mohr method, potassium chromate is used as an indicator, and the titration must be carried out under slightly alkaline conditions.
(E) The addition of ammonia in the EDTA titration of Zn²⁺ is to prevent the precipitation of Zn(OH)₂.