* Calcium carbonate (CaCO3): This is a white, insoluble solid.
* Carbon dioxide (CO2): This is a colorless, odorless gas.
* Water (H2O): This is a liquid.
The decomposition reaction is as follows:
Ca(HCO3)2 → CaCO3 + CO2 + H2O
This reaction is important in several natural processes, including:
* Formation of stalactites and stalagmites: Calcium bicarbonate in groundwater decomposes in caves, leading to the deposition of calcium carbonate, which forms these iconic formations.
* Water hardness: Calcium bicarbonate contributes to the hardness of water. When heated, it decomposes, leaving behind calcium carbonate that can cause scaling in pipes and appliances.
* Formation of limestone: Over long periods, the accumulation of calcium carbonate from decomposed calcium bicarbonate can form massive limestone deposits.
