Răspuns:
H3PO4+H2O---> H2PO4⁻ + H3O⁺
acid baza baza conj. acid conj
H2PO4⁻ + H2O----> HPO4²⁻ + H3O⁺
acid baza baza conj acid conj
HPO4²⁻+ H2O----> PO4³⁻ + H3O⁺
acid baza baza conj acid conj
H2CO3 + H2O---> HCO3⁻ + H3O⁺
acid baza baza conj acid conj
HCO3⁻ + H2O---> CO3 ²⁻ + H3O⁺
acid baza baza conj acid conj
Explicație: