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Standard XII
Chemistry
Osmotic Pressure
Calculate the...
Question
Calculate the molality of a solution of urea in acetic acid if the mole fraction of urea in solution is 0.5 ( molecular weight of urea=60) (1) 50/3 (2) 25/3 (3) 100/3 (4) 40/3
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Q.
An aqueous solution of urea containing 18g urea in 15
c
m
3
of the solution has a density equal to 1.052
g
/
c
m
3
. If the molecular weight of urea is 60, then the molality of the solution is:
Q.
Calculate the molality and mole fraction of the solute in an aqueous solution containing 6 g of urea per 500 g of water (Mol. mass of urea = 60).
Q.
Mass percentage of urea in aqueous solution is 30%.The molality of urea in the solution is:
(Mol. wt. of urea = 60 g mole
−
1
)
Q.
1
×
10
−
3
kg of urea is present in 400 cubic centimetre solution at 310 K. Calculate the approximate osmotic pressure of the solution.
(
R
=
8.314
J
m
o
l
−
1
K
−
1
, molecular weight of urea = 60)
Q.
22.22
gram of urea was dissolved in
300
grams of water. Calculate the number of moles of urea and molality of the urea solution.
(Given: Molar mass of urea
=
60
gram
m
o
l
−
1
).
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