Which of the following has the highest boiling point? O 0.20 m Na3PO4 O 0.45 m CH3CH2OH O 0.15 m RbCI O 0.50 m C5H12 O 0.30 m K2SO4

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Chapter1: Chemical Foundations
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**Question:**  
Which of the following has the highest boiling point?

- 0.20 m Na₃PO₄
- 0.45 m CH₃CH₂OH
- 0.15 m RbCl
- 0.50 m C₅H₁₂
- 0.30 m K₂SO₄

**Explanation:**

This question is assessing knowledge of colligative properties, specifically boiling point elevation. The boiling point increases with the presence of solute particles due to their effect on the solvent's vapor pressure. Solutions with higher molality - particularly those dissociating into multiple ions - tend to have higher boiling points. For example, electrolytes like Na₃PO₄ and K₂SO₄ dissociate into multiple ions, impacting boiling points more significantly than non-electrolytes like C₅H₁₂.
Transcribed Image Text:**Question:** Which of the following has the highest boiling point? - 0.20 m Na₃PO₄ - 0.45 m CH₃CH₂OH - 0.15 m RbCl - 0.50 m C₅H₁₂ - 0.30 m K₂SO₄ **Explanation:** This question is assessing knowledge of colligative properties, specifically boiling point elevation. The boiling point increases with the presence of solute particles due to their effect on the solvent's vapor pressure. Solutions with higher molality - particularly those dissociating into multiple ions - tend to have higher boiling points. For example, electrolytes like Na₃PO₄ and K₂SO₄ dissociate into multiple ions, impacting boiling points more significantly than non-electrolytes like C₅H₁₂.
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