18. Aqueous Equilibrium
Titrations: Diprotic & Polyprotic Buffers
2PRACTICE PROBLEM
Consider the titration of selenic acid (H2SeO4), a diprotic acid, with an aqueous KOH solution. The diagrams below depict different stages of titration. For simplicity, K+ ions and water molecules are not shown.
![](https://lightcat-files.s3.amazonaws.com/problem_images/6716ba4dccd59ba9-1673391172402.jpg)
Match each diagram to the correct stages of titration:
(i) First half-equivalence point
(ii) Second half-equivalence point
(iii) Second equivalence point
(iv) After the second equivalence point
Consider the titration of selenic acid (H2SeO4), a diprotic acid, with an aqueous KOH solution. The diagrams below depict different stages of titration. For simplicity, K+ ions and water molecules are not shown.
Match each diagram to the correct stages of titration:
(i) First half-equivalence point
(ii) Second half-equivalence point
(iii) Second equivalence point
(iv) After the second equivalence point