Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?

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KollegeApply · Accepted Answer

Al2(SO4)3 Explanation: Osmotic pressure depends on the number of solute particles in a solution. When Al2(SO4)3 dissolves, it dissociates into two aluminum ions (Al3+) and three sulfate ions \ce{(SO^2-_4)}, resulting in a total of five ions per molecule, giving it the highest number of particles compared to the other options: \ce{Al2SO4 -> 2Al3+ + 3SO^2-_4} (5 particles) \ce{Na2SO4 -> 2Na+ + SO^2-_4} (3 particles) \ce{MgCl2 -> Mg^2+ + 2Cl-} (3 particles) \ce{KCl -> K + Cl-} (2 particles)

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