Fe3++3H2O Fe(OH)3+3H+
Fe2(SO4)3+6H2O
2Fe(OH)3+3H2SO4
7.Fe2(SO4)3
CH3COO-+H2O CH3COOH+OH-
CH3COONa+H2O CH3COOH+NaOH
6.CH3COONa
NH4Cl+H2O NH3.H2O+HCl
NH4++H2O NH3.H2O+H+
5.NH4Cl
HS-+H2O H2S+OH-
NaHS+H2O H2S+NaOH