Carbonic acid

Carbonic acid

Names
IUPAC name Carbonic acid
Ither names Carbon dioxide solution; Dihydrogen carbonate; acid o air; Aerial acid; Hydroxymethanoic acid
Identifiers
CAS Registry Number	463-79-6 Y
ChEBI	CHEBI:28976 Y
ChEMBL	ChEMBL1161632 Y
ChemSpider	747 Y
InChI InChI=1S/CH2O3/c2-1(3)4/h(H2,2,3,4) Y Key: BVKZGUZCCUSVTD-UHFFFAOYSA-N Y InChI=1/CH2O3/c2-1(3)4/h(H2,2,3,4) Key: BVKZGUZCCUSVTD-UHFFFAOYAU
Jmol-3D images	Image
KEGG	C01353 Y
SMILES O=C(O)O
Properties
Chemical formula	H2CO3
Molar mass	62.03 g/mol
Density	1.668 g/cm3
Solubility in watter	Exists only in solution
Acidity (pKa)	6.367 (pKa1), 10.32 (pKa2)
Except whaur otherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
Y verify (whit is YN ?)
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.