Question

Your titration graph can be divided into ten segments that are listed below. Discuss what the relative (not numerical) concentrations of H2A, HA– , and A2– are in each of these ten segments. For example, for segment “Q” you might say “in segment Q, there is a lot more A 2– than HA– and almost no H2A in solution” or maybe “the amounts of A 2– and HA– are roughly equal and there’s just a little H2A.”

1. The start of the titration (no NaOH has been added.)

2. Between the first addition of NaOH to just before the 1st half-equivalence point

3. At the 1st half-equivalence point

4. Between the 1st half-equivalence point and the 1st equivalence point

5. At the 1st equivalence point

6. Between the 1st equivalence point and the 2nd half-equivalence point.

7. At the 2nd half-equivalence point

8. Between the 2nd half-equivalence point and the 2nd equivalence point

9. At the 2nd equivalence point

10. After the 2nd equivalence point

Answer 1