NaOH (sodium hydroxide) + HCl (hydrochloric acid) -> NaCl (sodium chloride) + H2O (water)
In this reaction, the hydroxide ions (OH-) from the sodium hydroxide combine with the hydrogen ions (H+) from the hydrochloric acid to form water molecules (H2O). The sodium ions (Na+) and the chloride ions (Cl-) from the two compounds combine to form sodium chloride (NaCl).
The reaction between sodium hydroxide and hydrochloric acid is an example of a neutralization reaction. Neutralization reactions occur when an acid and a base react in such a way that the acidic properties of the acid and the basic properties of the base are neutralized, resulting in the formation of a salt and water.