Na + H2O --> Fe + HCl --> Al + H2SO4 --> Ba + HCl --> Zn + H2SO4 --> Li2O + HCl -->

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This reaction sequence involves the reaction of various metals with different acids:

Sodium (Na) reacts with water (H2O) to form sodium hydroxide (NaOH) and hydrogen gas (H2).

Iron (Fe) reacts with hydrochloric acid (HCl) to form iron(II) chloride (FeCl2) and hydrogen gas (H2).

Aluminum (Al) reacts with sulfuric acid (H2SO4) to form aluminum sulfate (Al2(SO4)3) and hydrogen gas (H2).

Barium (Ba) reacts with hydrochloric acid (HCl) to form barium chloride (BaCl2) and hydrogen gas (H2).

Zinc (Zn) reacts with sulfuric acid (H2SO4) to form zinc sulfate (ZnSO4) and hydrogen gas (H2).

Lithium oxide (Li2O) reacts with hydrochloric acid (HCl) to form lithium chloride (LiCl) and water (H2O).

Overall, these reactions involve the displacement of hydrogen from the acid by the respective metal to form metal salts and hydrogen gas.