Question 1
The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H
2A with NaOH.
Which point a-d represents p
Ka2?
◦ point a
◦ point b
◦ point c
◦ point d
Question 2
The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H
2A with NaOH.
What is the pH at the first equivalence point?
◦ pH = (p
Ka1 + p
Ka2)/2
◦ pH = p
Ka1◦ pH = 14 - p
Ka1◦ pH = p
Ka1 + p
Ka2