Question

What is the significance of Henry's Law constant KH?

Answer 1

Henry's law is defined as, at a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.
Mathematically, at constant temperature:
p = k_H c
​where p is the partial pressure of the solute in the gas above the solution
c is the concentration of the solute and
k_H is Henry's law constant, depends on the solute, solvent and the temperature.
k_H : It has crucial importance in environmental chemistry, atmospheric chemistry, waste water treatment. They are needed since solubility affects volatilizations of toxic compounds into the air.