a solution of sucrose is prepared by dissolving 6.84g in 100 g of water at 298k
1. calculate the osmotic pressure of the solution at 298k
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Answer:
Osmotic pressure is:
π=CRT
where π= osmotic pressure
C=concentration
R=gas constant = 0.0821 atm L/K/mol
T= temperature
C=molesof solute/volume of solution
Assuming density of solution be 1g/mL
volume of 1000g water=1000mL=1L
solute is sucrose C
12
H
22
O
11
(M
C
12
H
22
O
11
=342g/mol)
n=mass/molar mass
given that solution contains 68.4 g sucrose
Thus n
C
12
H
22
O
11
=
342
68.4
=0.2
thus C=
1
0.2
=0.2M
π=0.2×0.0821×298
π=4.89 atm
Explanation:
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