試題詳解

29. At room temperature, a 0.02 mol/L MOH solution was added dropwisely to a 100 mL of 0.01 mol/L HA solution, and the curve shown in the figure below indicates the pH change of the mixed solution. Which of the following statements is correct?
(A)N is the equivalence point.
(B)At N, [A^-] =[M⁺] + [MOH].
(C)At K, [M⁺] ＞[A^-]＞ [OH^-] ＞[H⁺].
(D)HA is a weak acid and MOH is a strong base.
(E) At pH = 7, both HA and MOH are completely consumed.