Question

In two test tubes containing dilute hcl solution mg and cu metal are added separately. explain what will happen in each of the test tubes.

Answer 1

Mg + 2HCl -->MgCl2 + H2
Because Mg is more reactive than H2 so a displacement reaction occurs.

Cu + HCl --> HCl + Cu

No reaction as copper is less reactive than hydrogen so will not displace it from its compound.