試題詳解

3. Which of the following statements is true about buffer solutions?
(A) They maintain a constant pH when bases are added to them but not when acids are added to them.
(B) They maintain a constant pH when acids are added to them but not when bases are added to them.
(C) They fluctuate in pH when either acids or bases are added to them.
(D) They maintain a relatively constant pH when either acids or bases are added to them.