Textbook Question
You make a solution of a nonvolatile solute with a liquid solvent. Indicate if each of the following statements is true or false.
b. The freezing point of the solution is independent of the concentration of the solute.
14. Solutions
The Colligative Properties
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Which of the following compounds will have the highest boiling point?
A
0.10 M sucrose
B
0.10 M AgCl
C
0.25 M NH4NO3
D
0.45 M pure water
Verified step by step guidance1
Identify the colligative property that affects boiling point: Boiling point elevation is a colligative property, which means it depends on the number of solute particles in a solution, not their identity.
Determine the van't Hoff factor (i) for each compound: Sucrose is a non-electrolyte, so i = 1. AgCl is a sparingly soluble salt, but if it were fully dissolved, i = 2. NH4NO3 is a strong electrolyte, so i = 2. Pure water has no solute, so i = 0.
Calculate the effective concentration of particles for each solution: Multiply the molarity by the van't Hoff factor. For sucrose, it's 0.10 M * 1. For AgCl, it's 0.10 M * 2. For NH4NO3, it's 0.25 M * 2. For pure water, it's 0 M.
Compare the effective concentrations: The solution with the highest effective concentration of particles will have the highest boiling point elevation.
Conclude which solution has the highest boiling point: Based on the effective concentrations, determine which solution will have the highest boiling point.
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