Can copper dissolve in hydrochloric acid?

Can copper dissolve in hydrochloric acid? The truth about metals and acids

When you think of strong acids, you probably picture them eating through pretty much anything they touch. Because of this, it's easy to assume that hydrochloric acid could easily dissolve a common metal like copper. But chemistry doesn't always work the way we intuitively expect.

The short answer is no: copper will not dissolve or react in standard hydrochloric acid. If you drop a shiny copper penny into a beaker of HCl, absolutely nothing happens. No fizzing, no bubbling, and no dissolved metal.

Why does this happen? It all comes down to the reactivity series. Copper sits comfortably below hydrogen in this electrochemical ranking. Because it is less reactive than hydrogen, copper atoms simply don't have the chemical muscle to push hydrogen out of the hydrochloric acid solution to form copper chloride. Without that displacement, the reaction cannot take place.

Of course, copper isn't completely immune to acids forever. If you introduce an oxidizing agent—such as nitric acid, or hydrochloric acid mixed with hydrogen peroxide—the game changes entirely. But on its own, plain hydrochloric acid leaves copper completely untouched.