The reaction of hydrochloric acid (HCl) with solid sodium hydroxide (NaOH) is a neutralization reaction, producing:

* Sodium chloride (NaCl), a salt, and

* Water (H₂O).

Here's the balanced chemical equation:

HCl (aq) + NaOH (s) → NaCl (aq) + H₂O (l)

Let me know if you'd like a more detailed explanation of the reaction!