Adding magnesium ribbon to hydrochloride?

Question

Is it a chemical change?

You see, bubbles were formed when the ribbon was placed at the surface of the acid.

And when I accidentally dropped another ribbon on just a drop of HCl, the bubbles they released can be counted by fingers.

Any explanations?

Answer 1

Mg ribbon reacting with HCl is certainly a chemical change.

Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)

Much of the HCl had been used up by reacting with the first strip of Mg.  When you dropped in the second one, the reaction proceeded more slowly because the HCl was less concentrated.

Answer 2

yes it is a form of chemical change correct me if im wrong but magnesium is a base right HCL is an acid... The rule between the combination of base and acid applies on that concept forming magnesium hydrochloride...