Question

State Henry’s law and write its two applications.

Answer 1

Henry’s Law : It states that at constant temperature the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the surface of the liquid or solution.
Most common form of Henry’s law :
It states that the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution.
p α x_(g) or P = K_H x_(g), K_H = Henry’s law constant
(Out of these two only one statement needs to be written).
Application of Henry’s law :

1. Packaging of soft drink bottles. 
2. Scuba divers breathing apparatus.
3. Mountaineering at higher altitude.