When Br2 (diatomic bromine) reacts with HCl (hydrochloric acid), the products of the reaction are HBr (hydrobromic acid) and Cl2 (diatomic chlorine). The balanced chemical equation for this reaction is:

Br2 + 2HCl → 2HBr + Cl2

This reaction is an example of a redox reaction, where bromine undergoes reduction (from an oxidation state of 0 to -1) while chlorine undergoes oxidation (from an oxidation state of -1 to 0).