Answer:
H₂PO₄⁻ + H⁺ + Cl⁻ --> H₃PO₄ + Cl⁻
H₂PO₄⁻ + K⁺ + OH⁻ --> HPO₄⁻² + K⁺ + H₂O
Explanation:
An amphiprotic ion is an ion that can work as an acid or as a base. So, when it works like an acid, it loses one proton (H+), and when it works as a base, it gains one proton.
HCl is an acid, so the ion works as a base. The acid dissociates and forms H⁺ and Cl⁻:
H₂PO₄⁻ + H⁺ + Cl⁻ --> H₃PO₄ + Cl⁻
KOH is a base, so the ion works as an acid. The base dissociates and forms K⁺ and OH⁻:
H₂PO₄⁻ + K⁺ + OH⁻ --> HPO₄⁻² + K⁺ + H₂O
