Which of the following are true about buffers? A) An effective buffer is made from a strong acid and strong base. B) A buffer is most resistant to changes in pH when [HA] = [A^-]. C) A buffer is only resistant to changes in pH when acid is added. D) The pH range of a buffering system is 0 to 14.

Question

Quizplus · Accepted Answer

A buffer is most resistant to changes in pH when the concentrations of the weak acid (HA) and its conjugate base (A- or A^-) are equal. This is known as the buffer's optimal pH range. Strong acids and bases are not effective buffers as they completely dissociate in water and cannot maintain a stable pH range. The pH range of a buffer can vary depending on the specific buffer system, but it is typically limited to a range of a few pH units. Buffers are also effective in resisting changes in pH when small amounts of strong acid or base are added.

Which of the Following Are True About Buffers