Question

1. in the reaction hcl + naoh → nacl + h₂o, this is an example of: a precipitation reaction an acid - base reaction an oxidation - reduction reaction a combination reaction

Explanation:

The reaction $\text{HCl} + \text{NaOH}
ightarrow \text{NaCl} + \text{H}_2\text{O}$ involves a strong acid (HCl) reacting with a strong base (NaOH) to produce a salt (NaCl) and water. This matches the definition of an acid-base (neutralization) reaction. No precipitate forms, no oxidation states change, and it is not a combination reaction (which would form a single product).

Answer:

An acid-base reaction