(20) An aqueous solution containing 20% by weight of liquid X (molar weight=140) has a vapour pressure 160 mm at 600C.Calculate the vapour pressure of pure liquid 'X' if the vapour pressure of water is 150 mm at 600C
In 100 g solution there is 20 g liquid = 20/140 moles There are 80 g water = 80/18 moles Use this to find mole fraction of water and liquid. P_total=mole_fr_liq*Pr_liq+mole_fr_water*Pr_water
Use this to find Pressure of pure liquid.
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi
Moderation Team
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