# How would you complete this Bronsted-Lowrt reaction? HCO_3^(-) (aq)+ H^(+) (aq) rightleftharpoons ?

$H C {O}_{3}^{-} + {H}^{+} \left(a q\right) r i g h t \le f t h a r p \infty n s {H}_{2} O \left(l\right) + C {O}_{2} \left(g\right) \uparrow$
$H C {O}_{3}^{-} + {H}^{+} \left(a q\right) r i g h t \le f t h a r p \infty n s {H}_{2} C {O}_{3} \left(a q\right)$
${H}_{2} C {O}_{3}$ is so-called $\text{carbonic acid}$; which is probably better represented as ${H}_{2} O \cdot C {O}_{2} \left(a q\right)$. You could not buy a bottle of the same, though you could make solutions of $C {O}_{2}$, which we typically do when we make a carbonated drink.