SO3+H2O=H2SO4
H2SO4+Ca(OH)2 = CaSO4+2H2O
CaSO4+Mg(NO3)2 = MgSO4+Ca(NO3)2
MgSO4+2KOH=K2SO4+Mg(OH)2
Mg(OH)2 = MgO+H2O
MgO+2HCl = MgCl2+H2O
SO3+H2O=H2SO4
H2SO4+Ca(OH)2 = CaSO4+2H2O
CaSO4+Mg(NO3)2 = MgSO4+Ca(NO3)2
MgSO4+2KOH=K2SO4+Mg(OH)2
Mg(OH)2 = MgO+H2O
MgO+2HCl = MgCl2+H2O