Acid-base buffer systems minimize pH changes by
A) converting weak acids to strong acids.
B) converting strong acids to weak acids.
C) increasing the breathing rate.
D) promoting the excretion of hydrogen ions.
E) ensuring the number of acid molecules equals the number of base molecules.

Question

Quizplus · Accepted Answer

Buffer systems work by minimizing changes in pH. In an acid-base buffer system, a weak acid and its conjugate base or a weak base and its conjugate acid are present. When an acid (or base) is added, the buffer can neutralize it by either accepting or donating hydrogen ions (H+). In this way, buffer systems can convert a strong acid (or base) to a weak acid (or base), preventing large changes in pH. Choice B is the correct answer because it correctly identifies the way in which buffer systems function.

Acid-Base Buffer Systems Minimize PH Changes by