# How do you write an equation for the reaction between zinc metal and hydrochloric acid (aqueous) producing zinc chloride (aqueous) and hydrogen gas?

$Z n \left(s\right) + 2 H C l \left(a q\right) \to Z n C {l}_{2} \left(a q\right) + {H}_{2} \left(g\right)$
The net reaction is $Z n \left(s\right) + 2 {H}^{+} \left(a q\right) \to Z {n}^{2 +} \left(a q\right) + {H}_{2} \left(g\right)$
The $C {l}^{-}$ ions are spectators - they don't change.