Ask Question
30 July, 02:37

A buffer solution is made using a weak acid, HA. If the pH of the buffer is 9 and the ratio of A - to HA is 100, what is the pKa of HA?

+3
Answers (1)
  1. 30 July, 03:33
    0
    To calculate the pKa of the weak acid, we use the Henderson-Hasselbalch equation. It is expressed as pH = pKa - log [HA]/[A-]. This equation takes into account the concentration of the substance that does not dissociates into ions since it is a weak acid. We caculate as follows:

    pH = pKa - log [HA]/[A-]

    9 = pKa - log 1/100

    pKa = 7
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A buffer solution is made using a weak acid, HA. If the pH of the buffer is 9 and the ratio of A - to HA is 100, what is the pKa of HA? ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers