Can dilute HCL solution be kept in a copper vessel?

Can dilute HCL solution be kept in a copper vessel?

Answer: Copper ranks below hydrogen in the electrochemical class. So copper is less electropositive than hydrogen. Therefore copper cannot replace hydrogen in dilute hydrochloric acid (HCL). That is, copper does not react with dilute hydrochloric acid. So dilute hydrochloric acid can be kept in copper vessels.