Solutions are made that contain 0.10 moles of each of the following compounds in 100 g of H₂O.Choose the compound whose solution will have the highest freezing point. A)K₂SO₄ B)NaI C)Mg(CH₃CO₂)₂ D)Ca₃(PO₄)₂ E)Sr(NO₃)₂

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Quizplus · Accepted Answer

The freezing point depression of a solution is proportional to the number of particles in the solution. The compound that dissociates into the most particles will have the greatest freezing point depression. 
In this case, all of the compounds dissociate completely into ions except for NaI, which only dissociates into two particles (Na+ and I-). Therefore, NaI will have the highest freezing point because it has the fewest particles.

Solutions Are Made That Contain 0