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Isoelectric and Isoionic pH

9. Polyprotic Acid-Base Equilibria / Isoelectric and Isoionic pH / Problem 2

Problem 2

Calculate the isoelectric point of a diprotic acid with pK_a1 = 3.5 and pK_a2 = 5.5.

A

3.0

B

4.5

C

5.0

D

4.0