In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl₂ solution: A)the NaCl solution has the higher boiling point and the lower freezing point. B)the CaCl₂ solution has the higher boiling point and the lower freezing point. C)the NaCl solution has the higher boiling point and the CaCl₂ solution has the lower freezing point. D)the CaCl₂ solution has the higher boiling point and the NaCl solution has the lower freezing point. E)both solutions have the same boiling point and the same freezing point.

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Quizplus · Accepted Answer

The CaCl2 solution has a higher boiling point and a lower freezing point due to the van't Hoff factor. CaCl2 dissociates into three ions (Ca^2+ and 2 Cl^-), while NaCl dissociates into two ions (Na^+ and Cl^-), leading to a greater colligative effect for CaCl2.

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