Complete the chemical equations for the ionisation of phosphoric acid.
H₃PO₄→ H⁺ + H₂PO₄^–

(Dihydrogen phosphate ion)

H₂PO₄^–→ H⁺ + .....................

(Hydrogen phosphate ion)

......... → H⁺ + PO₄^3–

(Phosphate ion)

Question

Philoid · Accepted Answer

Those acids which contain more than one H⁺ ion, they dissociate in stages. Phosphoric acid is also an example of such acid.

Dissociation of phosphoric acid takes place in following stages:

H₃PO₄→ H⁺ + H₂PO₄^–

(Dihydrogen phosphate ion)

H₂PO₄^–→ H⁺ + HPO₄^2–

(Hydrogen phosphate ion)

HPO₄^2–→ H⁺ + PO₄^3–

(Phosphate ion)

Complete the chemical equations for the ionisation of phosphoric acid.H3PO4→ H+ + H2PO4–(Dihydrogen phosphate ion)H2PO4–→ H+ + .....................(Hydrogen phosphate ion)......... → H+ + PO43–(Phosphate ion)