Write the reaction equation: Na-NaH-NaOH-Na2SO4-Na- NaCl-NaOH-NaClO-NaCl

1. Heating metallic sodium to 360-400 ° C while passing hydrogen:
2Na + H2 = 2NaH.

2. Heating with water to form hydroxide:
NaH + H2O = NaOH + H2.

3. Interaction with sulfuric acid with the formation of sodium sulfate:
2NaOH + H2SO4 = Na2SO4 + 2H2O.

4. Substitution reaction with the formation of salt and free sodium:
Na2SO4 + Ba = BaSO4 + 2 Na.

5. Reaction of metallic sodium with chlorine gas:
2 Na + Cl2 = NaCl.

6. Electrolysis of sodium chloride with the formation of alkali:
2 NaCl + 2Н2О = 2NaOH + H2 + Cl2.

7. Passing gaseous chlorine through a concentrated alkali solution:
2NaOH + Сl2 = NaClO + NaCl + H2O.

8. Sodium hypochlorite is unstable and easily decomposes:
2 NaClO = 2NaCl + O2.