Which one of the following statements is TRUE?
A) A buffer is an aqueous solution composed of two weak acids.
B) A buffer can absorb an unlimited amount of acid.
C) A buffer resists pH change by neutralizing added acids and bases.
D) A buffer does not change pH when strong acid or base is added.
E) None of the above are true.

Question

Quizplus · Accepted Answer

Buffers work by neutralizing added acids (by donating OH-) and added bases (by donating H+), thus resisting changes in pH. They do not consist solely of weak acids, cannot absorb unlimited acid or base, and will change pH if enough strong acid or base is added, but they resist small changes in pH.

Which One of the Following Statements Is TRUE