For the chemical equations shown below, label each reactant as either acid or base, and each product as either conjugate acid or conjugate base according to the Brønsted-Lowry definition.
HPO4^2-(aq)+H2O(l)--->H2PO4^-(aq)+OH^-(aq)
HPO4^2-(aq)+H2O(l)--->PO4^3-(aq)+H3O^+(aq)