Henry’s law constant
Henry’s law is a gas law that states that at constant temperature, the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid.
C = K P (gas)
K = C/P(gas)
where c is solubility of gas at constant temperature (unit mol/dm^3)
K = Henry Constant
Pgas = Partial Pressure of Gas.
Unit of K = mol dm^-3 atm^-1