Answer
Please see the work below.
Work Step by Step
We know that chemical equations for equilibria involving carbon dioxide in water are given as follows.
$CO_2+H_2O\rightarrow _{\leftarrow}H_2CO_3$
$H_2CO_3 \rightarrow _{\leftarrow}H^++HCO_3^{-}$
$HCO_3^{-}\rightarrow \leftarrow H^++CO_3^{-2}$
