
Concept explainers
Interpretation:
The normal freezing point and boiling point of the given solution are to be calculated with the help of mass of solute and volume of solvent.
Concept introduction:
The expression for freezing point depression is given as follows:
Here,
denotes freezing point depression of solute,
denotes Van’t Hoff factor,
denotes the freezing point depression constant
The freezing point of pure solute is represented by
The expression for boiling point elevation is given as follows:
Here, the boiling point of pure solute is represented by
denotes Van’t Hoff factor,
denotes the boiling point elevation constant
The molality of the solution is calculated by the expression as:
Moles of compound can be calculated by the expression:
So, molality can also be calculated by:

Answer to Problem 67QP
Solution:
Explanation of Solution
a)
Since
For
The molar mass of
The normal boiling point and freezing point of water are given as follows:
The molality of the solution is calculated by the expression as follows:
Substitute the required values in the equation given above,
Therefore, the molality of
is
The expression for freezing point depression is given as follows:
Substitute the values of
Hence, the normal freezing point of
is
The expression for boiling point elevation is given as follows:
Substitute the values of
Hence, the normal boiling point of
is
b)
Since
of water is
For urea, the value of
The molar mass of urea is
The normal boiling point and freezing point of water are given as follows:
The molality of the solution can be evaluated as follows:
Substitute the required values in the equation given above.
Therefore, molality of urea is
The expression for freezing point depression is given as follows:
Substitute the values of
Hence, the normal freezing point of urea is
The expression for boiling point elevation is given as follows:
Substitute the values of
Hence, the normal boiling point of urea is
Want to see more full solutions like this?
Chapter 13 Solutions
Chemistry
- So I need help with understanding how to solve these types of problems. I'm very confused on how to do them and what it is exactly, bonds and so forth that I'm drawing. Can you please help me with this and thank you very much!arrow_forwardSo I need help with this problem, can you help me please and thank you!arrow_forwardDraw the reaction mechanism to predict the product of the transformation below: N H ? H₂Oarrow_forward
- Draw a structural formula for the major product of the acid-base reaction shown. H 0 N + HCI (1 mole) CH3 N' (1 mole) CH3 You do not have to consider stereochemistry. ● • Do not include counter-ions, e.g., Na+, I, in your answer. . In those cases in which there are two reactants, draw only the product from 989 CH3 344 ? [Farrow_forwardQuestion 15 What is the major neutral organic product for the following sequence? 1. POCI₂ pyridine ? 2. OsO4 OH 3. NaHSO Major Organic Product ✓ OH OH 'OH OH 'OH 'CIarrow_forwardURGENT! PLEASE HELP!arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningGeneral, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning





