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No, in the sense of single replacement, but yes under a special circumstance.

Copper and hydrochloric acid do not undergo a single replacement reaction because copper is lower on the activity series than hydrogen, the active component of the acid.

The reason for this is copper normally has an electron configuration of [Ar] 4s2 3d9, which changes when exposed to a reactive species like acid to [Ar] 4s1 3d10. This gives copper half-filled subshells which are more stable and therefore less reactive.

Copper will undergo a reaction to form a complex anion if the HCl is concentrated however:

Cu(s) + HCl(aq) --> [CuCl4]2-(aq).

Note that this is not single replacement, and only occurs when the HCl is concentrated.

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13y ago

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