1. HCL+NaOH=NaCl+H2O
H(+)+OH(-)=H2O
2. 2HCl+Na2O=2NaCl+H2O
2H(+)+Na2O=2Na(+)+H2O
3. 2HCl+2Na=2NaCl+H2
2H(+)+Na(+)=2Na(+)+2H(0)
4/ HCl+NaNO3=NaCl+HNO3