# Does carbonic acid H_2CO_3 exist?

H_2CO_3(aq) + NaOH(aq) rarr Na^(+)""^(-)HCO_3 +H_2O(l)
Carbonic acid is a bit of a $\text{pushmepullyou}$.....Most likely it exists in solution as ${H}_{2} O \cdot C {O}_{2}$, i.e. hydrated carbon dioxide, which has the identical formula. But certainly we can deal with it in terms of ${H}_{2} C {O}_{3}$; and its carbonate and its bicarbonate salts, e.g. $N {a}_{2} C {O}_{3}$, and $N a H C {O}_{3}$, are legion.