Identify the acid and base on the left side of following equations and identify their conjugate species on the right side. (Type your answer using the format (NH4)2CO3 for (NH4)2CO3, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-.)
(a) PO43- + H2O HPO42- + OH -
(b) CO32-(aq) + H2O(l) OH -(aq) + HCO3-(aq)
(c) H3PO4(aq) + NH3(aq) NH4+(aq) + H2PO4-(aq)