Bicarbonate
Polyatomic anion / From Wikipedia, the free encyclopedia
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In inorganic chemistry, bicarbonate (IUPAC-recommended nomenclature: hydrogencarbonate[2]) is an intermediate form in the deprotonation of carbonic acid. It is a polyatomic anion with the chemical formula HCO−
3.
For baking soda, see sodium bicarbonate. For the programming principle, see Tim Toady Bicarbonate.
Not to be confused with Dicarbonate.
"Hydrogen carbonate" redirects here. For the oxoacid, see carbonic acid.
"Hydrocarbonate" redirects here. For the gas, see water gas.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Hydrogencarbonate | |
Systematic IUPAC name
Hydroxidodioxidocarbonate(1−)[1] | |
Other names
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Identifiers | |
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3D model (JSmol) |
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3DMet | |
3903504 | |
ChEBI | |
ChEMBL | |
ChemSpider |
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49249 | |
KEGG |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
HCO− 3 | |
Molar mass | 61.0168 g mol−1 |
log P | −0.82 |
Acidity (pKa) | 10.3 |
Basicity (pKb) | 7.7 |
Conjugate acid | Carbonic acid |
Conjugate base | Carbonate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Close
Bicarbonate serves a crucial biochemical role in the physiological pH buffering system.[3]
The term "bicarbonate" was coined in 1814 by the English chemist William Hyde Wollaston.[4][5] The name lives on as a trivial name.