1. 2K+2H20=2KOH+H2
2. 2KOH+H2SO4=H2SO4+2H2O
1. 2Na+2H2O=2NaOH+H2
2. 2NaOH+H2CO3=Na2CO3+2H2O
3. Na2CO3+2HCl=2NaCl+H2O+CO2
4.2NaCl=2Na+Cl2
1. 2K+2H20=2KOH+H2
2. 2KOH+H2SO4=H2SO4+2H2O
1. 2Na+2H2O=2NaOH+H2
2. 2NaOH+H2CO3=Na2CO3+2H2O
3. Na2CO3+2HCl=2NaCl+H2O+CO2
4.2NaCl=2Na+Cl2