The reaction between iron (Fe) and hydrochloric acid (HCl) can be represented by the following equation:

Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g)

In this reaction, solid iron (Fe) reacts with hydrochloric acid (HCl) in aqueous solution to produce ferrous chloride (FeCl2) in aqueous solution and hydrogen gas (H2). The reaction involves the transfer of electrons from iron to hydrogen ions (H+), resulting in the formation of Fe2+ ions and H2 gas.