QUE : WHAT IS HENRY'S LAW?

 SOL: HENRY'S LAW  "the solubility of a gas in a liquid is directly proportional to the pressure of the gas over the solution at a given temperature

 m  ∝   P   or

                                            m = k  P   where k is Henry's constant.

In the  mixture of  non reacting gases in a solution, solubility of each gas is directly proportional to its own partial pressure. Solubility can be expressed in terms of mole fraction ,then Henry's law can be stated as

 " mole fraction of the gas in a solution is proportional to the partial pressure of the gas"

                               x   ∝  p            where, x is a mole fraction of the gas in solution

      or               p = KH x              where KH is called Henry's law constant.