Write the reaction equation: 1) NaCl-Na-NaH-NaOH-NaNO32) Mg-MgSO4-Mg (NO3) 2-MgO

A) 1) 2NaCl → 2Na + Cl2 (decomposition reaction; sodium chloride, sodium, chloride);

2) 2Na + H2 → 2NaH (compound reaction; sodium, hydrogen, sodium hydride);

3) NaH + H2O → NaOH + H2 (substitution reaction; sodium hydride, water, sodium hydroxide, hydrogen);

4) NaOH + NO2 → NaHNO3 (compound reaction; sodium hydroxide, nitrogen (IV) oxide, sodium hydronitrate).

B) 1) Mg + CuSO4 → MgSO4 + Cu (substitution reaction; magnesium, copper sulfate, magnesium sulfate, copper);

2) MgSO4 + Ba (NO3) 2 → BaSO4 + Mg (NO3) 2 (exchange reaction; magnesium sulfate, barium nitrate, barium sulfate, magnesium nitrate);

3) 2Mg (NO3) 2 → 2MgO + 4NO2 + O2 (decomposition reaction; magnesium nitrate, magnesium oxide, nitrogen (IV) oxide, oxygen).