`A` and `B` form ideal solution, at `50^(@)C,P_(A^(0)` is half `P_(B)^(0)`. `A` solution containing `0.2` mole of `A` and `0.8` mole of `B` has a normal boiling point of `50^(@)C`. Calculate `P_(A)^(0)` and `P_(A)^(0)` at `50^(@)C`.

Answer

`P_(B)^(0)=(1)/(0.9)=1.11` atm. `P_(A)^(0)` must then be `0.55` atm.