Which of the following aqueous solutions has the highest boiling point? K_b for water is 0.52°C/m. A)0.2 m KCl B)0.2 m Na₂SO₄ C)0.2 m Ca(NO₃)₂ D)A and B. E)B and C.

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The boiling point elevation depends on the van't Hoff factor (i), which is the number of particles the solute dissociates into. Na₂SO₄ dissociates into 3 ions (2 Na⁺ and 1 SO₄²⁻), and Ca(NO₃)₂ dissociates into 3 ions (1 Ca²⁺ and 2 NO₃⁻). Both solutions have a higher boiling point elevation than KCl, which dissociates into 2 ions (K⁺ and Cl⁻).

Which of the Following Aqueous Solutions Has the Highest Boiling