Identify the acid and the conjugate acid in the following chemical equation: PO4-3(aq) + HC2O4-1(aq) ⟷ HPO4-2 (aq) + C2O4-2(aq)    The acid is PO4-3(aq), the conjugate acid is C2O4-2(aq).        The acid is HC2O4-1(aq), but there is no conjugate acid.        The acid is HC2O4-1(aq), the conjugate acid is HPO4-2(aq).        The acid is HC2O4-1(aq), the conjugate acid is C2O4-2(aq).        The acid is PO4-3(aq), the conjugate acid is HPO4-2 (aq).

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