Write the reaction equation: Na – Na2O – NaCi – HCi – BaCi2

1) 4Na + O2 → 2Na2O (sodium oxide; compound reaction).

2) Na2O + 2HCl → 2NaCl + H2O (sodium chloride; exchange reaction, the reaction proceeds, since a weak electrolyte is formed in the form of water).

3) 2NaCl + H2SO4 conc. → Na2SO4 + 2HCl (sodium sulfate, hydrogen chloride (hydrochloric acid); exchange reaction, the reaction proceeds, since a gas is formed in the form of hydrogen chloride).

4) 2HCl + Ba (OH) 2 → BaCl2 + 2H2O (barium chloride; exchange reaction, the reaction proceeds, since a weak electrolyte is formed in the form of water).



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