In a buffer solution, if [A^-] [HA], which of the following must be true? A) pH pK_a C) pH = pK_a D) pH 7.00

Question

In a buffer solution, if [A^-] > [HA], which of the following must be true? A) pH < pK_a B) pH > pK_a C) pH = pK_a D) pH < 7.00 E) pH > 7.00

Quizplus · Accepted Answer

When the concentration of the conjugate base ([A-]) is greater than that of the acid ([HA]), it indicates that the solution is more basic. According to the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]), a higher [A-] compared to [HA] results in a positive log value, making pH > pKa.

In a Buffer Solution, If [A-] > [HA], Which of the Following

In a Buffer Solution, If [A^-] > [HA], Which of the Following