Determine the osmotic pressure of a solution a solution prepared by dissolving 2.5×10−2g of K2SO4 in 2L of water at 250C, assuming that it is completely dissociated. (R=0.0821LatmK−1mol−1, Molar mass of K2SO4=174gmol−1)
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Solution
Given, mass of K2SO4=25 mg
Volume=2 liter
Temperature=T=298 K
No. of ions produced on dissociation=3
Vant hoff factor=3
⟹ Osmotic pressure of the solution=Π=inRTV=(3)×12×0.0821×298=5.27×10−3 atm