State Henry's law and mention its some important applications.

Explanation

Henry.s law: The mass of the gas dissolved per unit volume of the solvent at a constant temperature is directly proportional to the pressure of the gas in equilibrium with the solution
Let m is the mass of gas, p is pressure of gas
`m = kp ....(1)`
as `x alpha p `
`x = k.p rArr p = 1/(k.) x`
`p = k_H x`
where `k_H` = Henry.s Law Constant