Chemistry question about amphiprotic species

Question

Which of these species are amphiprotic? Select all that are correct.

1. H₂PO₄^-
2. H₂O
3. HSO₄^-
4. Cl^-
5. H₃PO₄

Answer 1

H₂PO₄^-

H₂O

HSO₄^-

These are all amphiprotic. They can act as either an acid or a base. They can donate a proton (H+) or they can accept a proton.