# How does zinc metal react with hydrochloric acid?

$Z n \left(s\right) + 2 H C l \left(a q\right) \rightarrow Z n C {l}_{2} \left(a q\right) + {H}_{2} \left(g\right) \uparrow$
When we write $H C l \left(a q\right)$ or $Z n C {l}_{2} \left(a q\right)$ we mean the aquated ions in solution, i.e. probably ${H}_{3} {O}^{+}$ and ${\left[Z n {\left(O {H}_{2}\right)}_{6}\right]}^{2 +}$. When we write $Z {n}^{2 +}$ this is a convenient shorthand for the aquated complex.