29. At room temperature, a 0.02 mol/L MOH solution was added dropwisely to a 100mL of 0.01 mol/L HA
問題詳情
29. At room temperature, a 0.02 mol/L MOH solution was added dropwisely to a 100mL of 0.01 mol/L HA solution, and the curve shown in the figure below indicatesthe 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.