Which of the following aqueous solutions has the lowest freezing point? A)0.18 m KCl B)0.15 m Na₂SO₄ C)0.12 m Ca(NO₃)₂ D)pure water E)0.20 m C₂H₆O₂ (ethylene glycol)

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The freezing point depression is determined by the van't Hoff factor (i) and molality (m). Na₂SO₄ dissociates into 3 ions (2 Na⁺ and 1 SO₄²⁻), giving it the highest effective concentration of particles, resulting in the lowest freezing point.

Which of the Following Aqueous Solutions Has the Lowest Freezing