How does the amount of gas in a saturated solution change with pressure?

1 Answer
Sep 3, 2015


The amount of gas in a saturated solution is directly proportional to the pressure.


This is known as Henry's Law. It as often written as

#C = kP#,

where #C# is the concentration of the gas in the solution, #P# is the partial pressure of the gas, and #k# is a proportionality constant.

We see this effect in carbonated drinks.

Colas and root beer consist of flavoring and sugars added to a solution of carbon dioxide gas dissolved in water under pressure.

When the pressure is released, the solubility of the gas decreases, and bubbles of carbon dioxide escape from the liquid.