Final answer:
The reaction 2Al(s) + 3CuCl₂ (aq) → 2AlCl₃ (aq) + 3Cu(s) is an oxidation/reduction reaction, involving the transfer of electrons between aluminum and copper.
Step-by-step explanation:
The oxidation/reduction class of reaction best describes the reaction 2Al(s) + 3CuCl₂ (aq) → 2AlCl₃ (aq) + 3Cu(s). In this reaction, aluminum (Al) is being oxidized as it goes from having an oxidation state of 0 in its elemental form to an oxidation state of +3 in aluminum chloride (AlCl₃). Conversely, copper (Cu) is reduced as it goes from an oxidation state of +2 in copper(II) chloride (CuCl₂) to an oxidation state of 0 in its elemental form, copper metal. This reaction involves the transfer of electrons from aluminum to copper, which is a characteristic of oxidation-reduction reactions.