Elements and Compounds

What is calcium carbonate?

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2014-04-06 17:21:39

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.

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