ty of solvent?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Question 35** (4 Points)

Which of these solutes would have the largest effect on the boiling point of a solvent, assuming the same number of moles of each solute was added to the quantity of solvent?

- **A) NH2CH2COOH**
- **B) KCl**
- **C) MgSO4**

Explanation: The effect on the boiling point of a solvent when a solute is added can be evaluated through the concept of boiling point elevation, which states that the boiling point of a solution is higher than that of the pure solvent. The degree to which the boiling point is elevated depends on the number of particles into which the solute dissociates in the solvent. 

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Transcribed Image Text:--- **Question 35** (4 Points) Which of these solutes would have the largest effect on the boiling point of a solvent, assuming the same number of moles of each solute was added to the quantity of solvent? - **A) NH2CH2COOH** - **B) KCl** - **C) MgSO4** Explanation: The effect on the boiling point of a solvent when a solute is added can be evaluated through the concept of boiling point elevation, which states that the boiling point of a solution is higher than that of the pure solvent. The degree to which the boiling point is elevated depends on the number of particles into which the solute dissociates in the solvent. ---
Expert Solution
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The elevation in boiling point is directly proportional to Van’t-Hoff factor and molality of the solution. Since equal number of moles of each solute was added in the same quantity of solvent, the molality of all the solutions is equal. Hence, the elevation in boiling point is affected by the values of Van’t-hoff factor of each solution. Higher the value of i, higher is the elevation in boiling point.

 

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