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(D) The osmotic pressure $(\pi)$ is given by the formula $\pi = iCRT$,where $i$ is the van't Hoff factor,$C$ is the molar concentration,$R$ is the gas

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$0.03 \ M \ NaCl$ at $50 \ ^oC$

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(D) The osmotic pressure $(\pi)$ is given by the formula $\pi = iCRT$,where $i$ is the van't Hoff factor,$C$ is the molar concentration,$R$ is the gas constant,and $T$ is the temperature in Kelvin.For $A$: $i = 4$ $(AlCl_3 ightarrow Al^{3+} + 3Cl^-)$,$C = 0.011 \ M$,$T = 323 \ K$. $\pi \propto 4 	imes 0.011 	imes 323 = 14.212$.For $B$: $i = 2$ $(KCl ightarrow K^+ + Cl^-)$,$C = 0.03 \ M$,$T = 298 \ K$. $\pi \propto 2 	imes 0.03 	imes 298 = 17.88$.For $C$: $i = 3$ $((NH_4)_2SO_4 ightarrow 2NH_4^+ + SO_4^{2-})$,$C = 0.012 \ M$,$T = 298 \ K$. $\pi \propto 3 	imes 0.012 	imes 298 = 10.728$.For $D$: $i = 2$ $(NaCl ightarrow Na^+ + Cl^-)$,$C = 0.03 \ M$,$T = 323 \ K$. $\pi \propto 2 	imes 0.03 	imes 323 = 19.38$.Comparing the values,the solution with the highest osmotic pressure is $0.03 \ M \ NaCl$ at $50 \ ^oC$.

Which of the following aqueous solutions should have the highest osmotic pressure?

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