Which of the Following Statements is True About Buffer Solutions

Question

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 maintain a relatively constant pH of approximately 7 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.
E) They are found only in living systems and biological fluids.

Accepted Answer

Buffer solutions can maintain a relatively constant pH when either acids or bases are added to them. This is because buffer solutions consist of a weak acid and its conjugate base, which can neutralize added acids or bases without changing the pH too much.