Identify the type of chemical reaction.

H2CO3 H2O + CO2

We have the reaction: CO2 + H2O (yield arrow) > H2CO3. It means that carbon dioxide + water makes H2CO3 or Carbonic Acid. This reaction is also reversible, so H2CO3 (yield arrow) > CO2 + H2O. This reversible reaction gives a name to reaction: Carbonic anhydrase. It means that it removes the water molecul from Carbonic Acid. Answer: This is a reversible reaction : Carbonic anhydrase.