Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable. A) 0.075 mol kg^-1 NaI B) 0.075mol kg^-1 (NH₄)₃PO₄ C) 0.075 mol kg^-1 NaBrO₄ D) 0.075 mol kg^-1 LiCN E) 0.075 mol kg^-1 KNO₂

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The freezing point depression is proportional to the van't Hoff factor (i), which is the number of particles the solute dissociates into. (NH4)3PO4 dissociates into 4 ions (3 NH4+ and 1 PO4^3-), resulting in the highest van't Hoff factor among the options, thus the lowest freezing point.

Choose the Aqueous Solution Below with the Lowest Freezing Point