What is calcium carbonate?
Calcium carbonate is an ionic salt, formed from the cationic
calcium (II) and the anionic carbonate ion CO32-. It is found
naturally in limestone and in seashells.
vCalcium carbonate reacts with acids, releasing carbon
vCalcium carbonate will react with water that is saturated with
carbon dioxide to form the soluble calcium bicarbonate.
+ CO2 + H2O → Ca(HCO3)2
reaction is important in the erosion of carbonate rocks, forming
caverns, and leads to hard water in many regions.
with a large amount of dissolved calcium is hard water.