The reaction between NaCl (sodium chloride) and HCl (hydrochloric acid) is not a neutralization reaction. A neutralization reaction occurs when an acid and a base react to form a salt and water. In this case, NaCl is a salt, and HCl is an acid. When they are mixed, they do not react to form a new substance. Instead, the HCl simply dissolves the NaCl, forming a solution of hydrochloric acid.