Partial pressure in non-ideal solution by Raoult's law,ideal-gas law(fugacity,activity coefficient)
partial pressure of the component i in the mixture
mole fraction of the component i
vapor pressure of the pure component i
An ideal solution can be said to follow Raoult's Law but it must be kept in mind that in the strict sense ideal solutions do not exist. For a solution to be ideal we must assume that it does not matter whether a molecule A has another A as neighbor or a B molecule.