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(C) Two solutions separated by a semipermeable membrane will not show any net flow of solvent if they are isotonic,meaning they have the same osmotic

Vedclass · Accepted Answer

$6 \ g$ urea $dm^{-3}$ and $34.2 \ g$ sucrose $dm^{-3}$

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(C) Two solutions separated by a semipermeable membrane will not show any net flow of solvent if they are isotonic,meaning they have the same osmotic pressure $(\pi = CRT)$.For solutions with the same volume,this condition is met if the number of moles of solute is equal $(n_{urea} = n_{sucrose})$.Checking option $C$:Moles of urea = $\frac{6 \ g}{60 \ g \ mol^{-1}} = 0.1 \ mol$.Moles of sucrose = $\frac{34.2 \ g}{342 \ g \ mol^{-1}} = 0.1 \ mol$.Since the number of moles is equal,the osmotic pressures are equal,and no net flow of solvent occurs.

Which of the following solutions will not show flow of solvent in either direction when separated by a semipermeable membrane?

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