Answer:
Hydrochloric Acid
Explanation:
NaOH + HCl = NaCl +H2O
In a Neutralization reaction a base (NaOH) and an acid (HCl) react together to form neutral products. H2O is always a product and a salt is also produced such as KCl or in this case NaCl.
The Na switches with the H to form NaCl.
and the 2 H and the O create H2O.