consider the following acids and their dissociation constants: HPO4^2-(aq)+H2O(l)<__->H3O^+(aq)+PO4^3-(aq). Ka=2.2x10^-13. HCOOH(aq)+H2O(l)<__->H3O^+(aq)+HCOO^-(aq). Ka=1.8x10^-4. a)which is the weaker acid, HPO4^2- or HCOOH? b)what is the conjugate base of HPO4^2-? c)which acid has the weaker conjugate base? d)which acid has the stronger conjugate base? e)which acid produces more ions