Définition
Sens technique
Salt present in water of calcareous origin and which is one of the causes of its hardness.
Chemical formula: Ca(HCO3)2
Unstable salt in aqueous solution, which tends to decompose into CaCO3 (calcium carbonate) and H2CO3 (carbonic acid). Heat accelerates this transformation which leads to the deposit of limestone (tartar) on the walls of containers or pipes containing bicarbonated water, and to the release of carbon dioxide.
Source
according to OiEau
Thématiques associées