Which of the following species is amphiprotic within an aqueous solvent?  
a) Br^–                           b) HC₂H₃O₂                   c) SO₄^2–                        d) HSe^–                        e) H₃­O⁺

Which of the following species is/are amphoteric?

H₂O + HCO₃⁻ ⇆ H₃O⁺ + CO₃²⁻
H₂O + HCO₃⁻ ⇆ H₂CO₃ + OH⁻

The hydrogen sulfite ion 1HSO3-2 is amphiprotic. Write a balanced chemical equation showing how it acts as an acid toward water and another equation showing how it acts as a base toward water.

Write an equation for the reaction in which H2C6H7O5-1aq2 acts as an acid in H2O1l2.

Write an equation for the reaction in which H2C6H7O5-1aq2 acts as a base in H2O1l2.

Both H₂O and H₂PO₄^– are amphoteric. Write an equation to show how each substance can act as an acid and another equation to show how each can act as a base.