The balanced molecular equation for this reaction is
2HCl(aq) + Ba(OH)2(aq) ===> BaCl2(aq) + 2H2O(l).
The neutralization of hydrochloric acid and barium hydroxide.
Molecular formula for hydrochloric acid is HCl and barium hydroxide is Ba(OH)2.
Hydrochloric acid and barium hydroxide is aqueous in nature.
HCl have one H+ ion and barium hydroxide has two hydroxide (OH) group.
So, it will take two HCl to neutralize one Ba(OH)2.
Hence, equation for this reaction is
2HCl(aq) + Ba(OH)2(aq) ===> BaCl2(aq) + 2H2O(l).
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