Final answer:
The reaction between magnesium metal and hydrochloric acid is both an acid-base reaction and a single displacement reaction.
Step-by-step explanation:
The reaction between magnesium metal and hydrochloric acid solution is both an acid-base reaction and a single displacement reaction. The chemical equation for the reaction is:
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
In this reaction, the magnesium metal reacts with the hydrochloric acid to produce magnesium chloride and hydrogen gas. The magnesium metal displaces the hydrogen in the acid, which is why it is also considered a single displacement reaction.