Again another problem with chemistry. What's the net ionic equation of....?

Good Job: you got the molecular right and you balanced it.

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

Now remember your solubility rules (you can look them up), but MgCl2 and HCl are very soluble and labeled aqueous so they will ionize completely.

To get the net ionic, we will have to break everything that is water soluble (aq) into ions. (Ionic equation)

2H(+) + 2Cl(-) + Mg(s) ===> H2(g) + Mg(2+) + 2Cl(-)

Now we take a look at both sides of the equation and cancel any spectator ions (ions that are found on both sides of the equation).

The only one I see is the 2Cl(-) ions, so we cancel them out and rewrite what we have to get the (NET IONIC EQUATION).

2H(+) + Mg(s) ===> H2(g) + Mg(2+)

Good luck and I hope that made sense.

In net ionic equation, you only write the substances which transform. Like from solid to liquid. The ans for your question is:

Mol. Eq:

HCl(aq) + Mg(s) ===> H2(g) + MgCl2(s)

Net. Ion. Eq:

(H+)aq + (Cl-)aq + Mg(s) ===> H2(g) + MgCl2(s)

Hope I am right. Good luck!

When an acid and a metal react, they form a salt and hydrogen. The metal and the anion of the acid combine in the salt.

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

Mg + 2H+ -> Mg2+ + H2