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 Nummer	463-79-6 ;
3D model (JSmol)	Interactive eemage;
ChEBI	CHEBI:28976 ;
ChEMBL	ChEMBL1161632 ;
ChemSpider	747 ;
KEGG	C01353 ;
	InChI InChI=1S/CH2O3/c2-1(3)4/h(H2,2,3,4) Key: BVKZGUZCCUSVTD-UHFFFAOYSA-N ; InChI=1/CH2O3/c2-1(3)4/h(H2,2,3,4) Key: BVKZGUZCCUSVTD-UHFFFAOYAU;
	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 itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Carbonic acid is the chemical compoond wi the formula H₂CO₃ (equivalently OC(OH)₂). It is an aa a name whiles gien tae solutions o carbon dioxide in watter (carbonatit watter), acause sic 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 sic as stalactites an stalagmites.