NCERT Class XII Chemistry
Chapter - Solutions
Questions with Solutions
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Question : 53
Total: 53
Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.
Solution:
Given, Number of moles of solute dissolved (n)
=
=
m o l
V = 450 m L = 0.450 L ,
T = 37 0 C
= 37 + 273 = 310 K R = 8.314 k P a L K − 1 m o l − 1
= 8.314 × 10 3 P a L K − 1 m o l − 1
pi = C R T =
R T
Substituting these values, we get
π =
×
× 8.314 × 10 3 × 310
= 30.96 P a
Substituting these values, we get
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