Question
The vapour pressure lowering caused by the addition of 100 g of sucrose(molecular mass = 342) to 1000 g of water if the vapour pressure of pure water at 250C is 23.8 mm Hg
A.
B.
C.
D.
As we learned
Expression of relative lowering of vapor pressure -
- wherein
Given the molecular mass of sucrose = 342
Thus option B is correct.