# How does magnesium react with hydrochloric acid?

Mar 23, 2017

$\text{Magnesium metal + hydrochloric acid}$
$\rightarrow$ $\text{magnesium chloride + dihydrogen gas}$

#### Explanation:

Magnesium metal is oxidized to $M {g}^{2 +}$.

$M g \left(s\right) \rightarrow M {g}^{2 +} + 2 {e}^{-}$

Protium ion is REDUCED to dihydrogen gas:

${H}^{+} + {e}^{-} \rightarrow \frac{1}{2} {H}_{2} \left(g\right)$

And thus the net ionic equation is, $M g \left(s\right) + 2 {H}^{+} \rightarrow M {g}^{2 +} + {H}_{2} \left(g\right) \uparrow$

Overall:

$M g \left(s\right) + 2 H C l \left(a q\right) \rightarrow M g C {l}_{2} \left(a q\right) + {H}_{2} \left(g\right) \uparrow$

Are all these equations balanced with respect to both MASS and CHARGE? If not they should be!