Question

Hydrogen phosphate, H3PO4(s), is a chemical substance, which, in pure anhydrous form, exists as white solid. It melts at 42.35oC to form a viscous colourless liquid. In aqueous solution, it ionizes as follows:
H3PO4 (aq) + H2O(l) → H3O+(aq) + H2PO4– (aq)
H2PO4–(aq) + H2O(l)→ H3O+(aq) + HPO42–(aq)
HPO42– (aq) + H2O(l)→ H3O+(aq) + PO43–(aq)

In the above equilibrium reactions, H3PO4(aq) acts as a(n)

Answer 1

what kind of acid polyprotic acid or strong acid?

Answer 2

acid.

Answer 3

H3PO4 is a polyprotic acid. It can donate multiple protons (H+) in aqueous solution and undergo multiple ionization reactions.