NaOH+HCl=NaCl+H2O
Ca(OH)2+2HCl=CaCl2+2H2O
Mg(OH)2+2HCl=MgCl2+2H2O
2NaOH+H2SO4=Na2SO4+2H2O
Ca(OH)2+H2SO4=CaSO4+2H2O
Mg(OH)2+H2SO4=MgSO4+2H2O