# Question #1dbe4

$B a C {l}_{2} \left(a q\right) + {H}_{2} S {O}_{4} \left(a q\right) \rightarrow B a S {O}_{4} \left(s\right) \downarrow + 2 H C l \left(a q\right)$
Of course in aqueous solution the hydrochloric acid is present as ${H}_{3} {O}^{+}$ and $C {l}^{-}$ ions. The reaction is a REPRESENTATION of what occurs in solution, which results in precipitation of insoluble $B a S {O}_{4}$.