Structure via PubChem · Public domain (PubChem)
calcium bicarbonate
Sign in to saveAlso known as Calcium hydrogen carbonate
chemical compound existing only in aqueous solution (Ca(HCO₃)₂)
Chemical data
- Formula
- C2H2CaO6
- Molecular weight
- 162.11 g/mol
- IUPAC name
- calcium;carbonic acid;carbonate
- SMILES
- C(=O)(O)O.C(=O)([O-])[O-].[Ca+2]
- InChIKey
- NKWPZUCBCARRDP-UHFFFAOYSA-L
- Polar surface area
- 121 Ų
- H-bond donors
- 2
- H-bond acceptors
- 6
- Formal charge
- 0
via PubChem
Wikidata facts
- Mass
- 161.948
Show 2 more facts
- canonical SMILES
- C(=O)(O)[O-].C(=O)(O)[O-].[Ca+2]
- chemical formula
- C₂H₂CaO₆
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
Calcium bicarbonate, also called calcium hydrogencarbonate, has the chemical formula Ca(HCO3)2. The term does not refer to a known solid compound; it exists only in aqueous solution containing calcium (Ca), bicarbonate (HCO 3), and carbonate (CO 3) ions, together with dissolved carbon dioxide (CO2). The relative concentrations of these carbon-containing species depend on the pH; bicarbonate predominates within the range 6.36–10.25 in fresh water.
All waters in contact with the atmosphere absorb carbon dioxide, and as these waters come into contact with rocks and sediments they acquire metal ions, most commonly calcium and magnesium, so most natural waters that come from streams, lakes, and especially wells, can be regarded as dilute solutions of these bicarbonates. These hard waters tend to form carbonate scale in pipes and boilers, and they react with soaps to form an undesirable scum.
Excerpted from Wikipedia’s “calcium bicarbonate” article, available under the CC BY-SA 4.0 licence.