Magnesium carbonate, MgCO3, reacts with nitric acid, HNO3, to form magnesium nitrate and carbonic acid. Carbonic acid reacts to form water and carbon dioxide. Which type of reaction does carbonic acid undergo?
Carbonic acid undergoes decomposition reaction. Decomposition reaction starts with one reactant and forms two or more products: AB⇒A+B. In this reaction, H2CO3 ⇒H2O + CO2.