100 g of liquid A (molar mass 140 g mol -1 ) was dissolved in 1000 g of liquid B (molar mass 180 g mol -1 ). The vapour pressure of pure liquid B was found to be 500 torr. Calculate vapour pressure of A (in torr) the solution if the total vapour pressure of the solution is 475 torr.

Question

100 g of liquid A (molar mass 140 g mol -1 ) was dissolved in 1000 g of liquid B (molar mass 180 g mol -1 ). The vapour pressure of pure liquid B was found to be 500 torr. Calculate vapour pressure of A (in torr) the solution if the total vapour pressure of the solution is 475 torr. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Q. 100g of liquid A (molar mass 140gmol−1 ) was dissolved in 1000g of liquid B (molar mass 180gmol−1 ). The vapour pressure of pure liquid B was found to be 500 torr. Calculate vapour pressure of A (in torr) the solution if the total vapour pressure of the solution is 475 torr.