Why does carbonated water keeps it’s gas under pressure and loses it otherwise?

Question

Why does carbonated water keeps it’s gas under pressure and loses it otherwise?

In: Chemistry

Answer 1

so co2 dissolving in water is a reversible reaction, the co2 can dissolve and can also come out of solution

normally in air the concentration of co2 is fairly low (in absolute terms) so very little dissolves in the water

if the co2 is concentrated and at higher pressure then more will dissolve into the water than what escapes, and this is how we carbonate stuff

if on the other hand you seal a bottle the co2 will start coming out of solution, until the pressure increases, and that will make more dissolve in the water until the rate of co2 dissolving and escaping match, in that case we reach equilibrium and the co2 level stays constant, even though it’s still constantly and slowly dissolving in and out of solution