answersLogoWhite

0

Does CO2 react with H2O

Updated: 8/10/2023
User Avatar

Wiki User

12y ago

Best Answer

Yes. This is the most given answer, though not precise.

Carbonic Acid is formed. H2O + CO2 --> H2CO3 which in turn also forms hydrogen bonds.

==========================================

Actually there are no molecules of H2CO3 in aqueous solution. They don't exist.

What is called "carbonic acid" is actually a solution of dissolved CO2 in equilibrium with small amounts of H+ and HCO3-, which is what makes it acidic:

CO2(aq) + H2O(l)<==> H+ + HCO3-

The equilibrium lies far to the left, meaning that the CO2 stays mostly CO2(aq).

As for hydrogen bonding between CO2 and H2O, the answer is "maybe".

The conventional wisdom is that hydrogen bonding occurs when H is internally bonded to N, O or F, and where the H of one molecule is weakly, covalently bonded to N, O or F of an adjacent molecule. A hydrogen bond is more than simply an electrostatic attraction. The hydrogen bond has been shown to exhibit covalent bond characteristics. But, the few HCO3- (HOCO2-) molecules formed can exhibit hydrogen bonding with water molecules.

The big question concerns the attraction between the H of a water molecule and a lone pair of electrons on an oxygen in CO2.

O=C=O:--- H-O-H

According to the newest description of the hydrogen bond by the IUPAC, the attraction between water and CO2 constitutes a hydrogen bond. This helps explain why CO2 is very soluble in water.

The IUPAC recently has redefined the hydrogen bond.

The gist of the change is that the hydrogen bond has significant covalent character rather than being merely an electrostatic attraction.

Added:

For a newer link to IUPAC's 'Definition of the Hydrogen Bond' by E. Arunan et all (Oct. 2010),

c.f. Related links just below this page.

User Avatar

Wiki User

12y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

12y ago

Carbon dioxide dissolved in water can be considered as an acid - carbonic acid, H2CO3.

This answer is:
User Avatar

User Avatar

Wiki User

14y ago

No, 'cause there is no H in it

This answer is:
User Avatar

User Avatar

Wiki User

11y ago

2

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Does CO2 react with H2O
Write your answer...
Submit
Still have questions?
magnify glass
imp