HCO3- + H2O ---><--- H2CO3 + OH-
HCO3- + H2O ----><--- CO3-2 + H3O+
Dihydrogen Phosphate is H2PO4-1
H2PO4-1 + H2O ---><--- H3PO4 + OH-
H2PO4-1 + H2O ---><--- HPO4-2 + H3O+
HIDROGEN PHOSPHATE IS HPO4-2 and for it you've got:
HPO4-2 + H2O ---><--- H2PO4-1 + OH-
HPO4-2 + H2O ---><--- PO4-3 + H3O
