225mL of glycerol C3H8O3 in 2500 mL if aqueous solution dens

22.5mL of glycerol (C3H8O3) in 250.0 mL if aqueous solution (density of glycerol= 1.265 g/ml) at 20 degrees C.


What\'s the osmotic pressure?


I keep getting 18.51 atm as an answer, but this is incorrect. Please help!

Solution

mass of glycerol = 22.5*1.265 = 28.4625 g

moles of glycerol = 28.4625/92.1 = 0.309moles

total volume = 250ml = 0.25L

so concentration M = 0.309/0.25 = 1.236M


P = MRT

P = 1.236*0.082*293 = 29.696 atm

22.5mL of glycerol (C3H8O3) in 250.0 mL if aqueous solution (density of glycerol= 1.265 g/ml) at 20 degrees C. What\'s the osmotic pressure? I keep getting 18.5

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