1.

Calculate the vapour pressure at 295 K of a 0.1 M solution of urea. The density of the solution may be taken as 1g//cm^(3). The vapour pressure of pure wa ter at 295 K is 20 mm.

Answer»


Solution :0.1 M solution of UREA means 0.1 mol, i.e., 6.0 G of urea are DISSOLVED per litre of solution =, i.e., in 1000 g of solution (`because" density = "1g//cm^(3)`). Hence, `w_(2)=6.0g, w_(1)=1000-6.0=994g, p^(@)=20,,` (Given), `p_(s)`= To be CALCULATED.


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