When water mixes with carbon dioxide in the air, what is formed?

H2O + CO2 --> H2CO3

carbonic acid

I don't think this is correct because there is no aid in co2. It just ends up to be CO2 in liquid form. Basically water with air is carbonated water.

that is definitely correct.
copy and paste it into google if you want an explanation.

You are partially correct. When water mixes with carbon dioxide in the air, it does not directly form carbonic acid (H2CO3). Instead, it creates a weak acid called carbonic acid by following the following reaction:

CO2 + H2O ⇌ H2CO3

The reaction is reversible, meaning that carbonic acid can also break down back into carbon dioxide and water.

Carbonic acid is a relatively unstable compound, especially in aqueous solutions, and it rapidly dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-). These ions can further dissociate into hydrogen ions and carbonate ions (CO3^2-).

Overall, when water mixes with carbon dioxide, it leads to the formation of carbonic acid, which can dissociate into various ions.