Final answer:
The reaction 2HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2H2O(l) is an acid-base neutralization reaction forming water and a salt.
Step-by-step explanation:
The chemical reaction given, 2HCl(aq) + Ba(OH)₂(aq) → BaCl₂(aq) + 2H₂O(l), is an example of an acid-base neutralization reaction. In this type of reaction, an acid and a base react to form water and a salt. The given reaction involves hydrochloric acid (HCl), which is a strong acid that dissolves in water to yield hydronium ions, and barium hydroxide (Ba(OH)₂), which is a strong base. The products are barium chloride (BaCl₂), a salt, and liquid water (H₂O).
For instance, in a similar neutralization reaction between HCl and sodium hydroxide (NaOH), the net ionic equation simplifies to the combination of hydrogen ions (H+) with hydroxide ions (OH-) to produce water, leaving the spectator ions out of the equation:
H+(aq) + OH-(aq) → H₂O(l)