Carbonic acid

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Carbonic acid
CAS number 463-79-6 YesY
ChemSpider 747 YesY
KEGG C01353 YesY
ChEBI CHEBI:28976 YesY
Jmol-3D images Image 1
Molecular formula H2CO3
Molar mass 62.03 g/mol
Density 1.668 g/cm3
Solubility in water Exists only in solution
Acidity (pKa) 6.367 (pKa1), 10.32 (pKa2)
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Carbonic acid is the chemical compoond wi the formula H2CO3 (equivalently OC(OH)2). It is an aa a name sometimes given tae solutions o carbon dioxide in watter (carbonatit watter), acause such solutions contain smaa amoonts o H2CO3. Carbonic acid, which is a weak acid, furms twa kinds o sauts, the carbonates an the bicarbonates. In geology, Carbonic acid causes limestane tae dissolve producin calcium bicarbonate which leads tae mony limestone featurs such as stalactites an stalagmites.