試題詳解

74. How many of the following will raise the pH of a weak acid HA in aqueous solution?
I. Addition of water.
II. Making a buffered solution by adding NaA(s).
III. Addition of NaCl(s).
IV. Addition of HNO₃.
V. Titrating with KOH.
(A) 5
(B) 4
(C) 3
(D) 2
(E) 1