Question

An aqueous solution containing $28\%$ by mass of a liquid A (molecular mass = 140) has a vapour pressure of 160 mm at ${37}^{o}C$. Find the vapour pressure of pure liquid A (the vapour pressure of water ${37}^{o}C$ is 150 mm).

• A. $p_A=358.3mm$
• B. $p_A=388.3mm$
• C. $p_A=258.3mm$
• D. None of these

Answer 1

The correct option is A $p_A=358.3mm$