Hey there partner, You get carbonated or fizzy water. The process requires that the cold/cool water be saturated with CO2. (when the CO2 returns to a gas, it is exothermic… gives off heat). read more
You can form carbonic acid: H2O + CO2 = H2CO3. (The = here indicates an equilibrium). An example is a sealed bottle of soda water, which contains carbonic acid. As you break the seal, the pressurized gas containing CO2 escapes. read more
If there were any reactions, then we would have H2Co3, but this seldom happens, so they usually show the H2Co3 with (H2o+Co2)! because these two can't make H2Co3 in common situations. read more