有冇AgOH,Al2(CO3)3,Fe2(CO3)3

usually , there is no AgOH, because the reaction will produce Ag2O.
Al3+ and Fe3+ are acidic,
[Al(H2O)6]3+ + H2O <-----------> [Al(OH)(H2O)5]3+ + H3O+(acidic)
Fe3+ has the same equation with Al3+