What is the freezing point of a solution prepared by dissolving 63.49 g of glycerin (C3H3O3) in 100.g ethanol? The freezing point of ethanol (C2H5OH) is-114.1 °C. The freezing point depression constant for ethanol is 1.99 °C/m.

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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
Question
**Problem Statement**

What is the freezing point of a solution prepared by dissolving 63.49 g of glycerin (C₃H₈O₃) in 100 g of ethanol? The freezing point of ethanol (C₂H₅OH) is -114.1 °C. The freezing point depression constant for ethanol is 1.99 °C/m.

---

**Explanation**

In this problem, we're asked to calculate the freezing point of a solution using the concept of freezing point depression. This is a colligative property that depends on the number of solute particles in a solution. The data provided includes:

- Mass of glycerin: 63.49 g
- Mass of ethanol: 100 g
- Freezing point of pure ethanol: -114.1 °C
- Freezing point depression constant for ethanol: 1.99 °C/m

The formula for freezing point depression is:

\[ \Delta T_f = i \cdot K_f \cdot m \]

Where:
- \( \Delta T_f \) is the decrease in freezing point.
- \( i \) is the van't Hoff factor (for glycerin, it is 1 because it does not ionize in solution).
- \( K_f \) is the freezing point depression constant.
- \( m \) is the molality of the solution.
Transcribed Image Text:**Problem Statement** What is the freezing point of a solution prepared by dissolving 63.49 g of glycerin (C₃H₈O₃) in 100 g of ethanol? The freezing point of ethanol (C₂H₅OH) is -114.1 °C. The freezing point depression constant for ethanol is 1.99 °C/m. --- **Explanation** In this problem, we're asked to calculate the freezing point of a solution using the concept of freezing point depression. This is a colligative property that depends on the number of solute particles in a solution. The data provided includes: - Mass of glycerin: 63.49 g - Mass of ethanol: 100 g - Freezing point of pure ethanol: -114.1 °C - Freezing point depression constant for ethanol: 1.99 °C/m The formula for freezing point depression is: \[ \Delta T_f = i \cdot K_f \cdot m \] Where: - \( \Delta T_f \) is the decrease in freezing point. - \( i \) is the van't Hoff factor (for glycerin, it is 1 because it does not ionize in solution). - \( K_f \) is the freezing point depression constant. - \( m \) is the molality of the solution.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps

Blurred answer
Knowledge Booster
Solutions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY