Laboratory Experiments for Chemistry: The Central Science (14th Edition)
Laboratory Experiments for Chemistry: The Central Science (14th Edition)
14th Edition
ISBN: 9780134566207
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus, John H. Nelson, Kenneth C. Kemp
Publisher: PEARSON
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Question
Chapter 11, Problem 1DE
Interpretation Introduction

Interpretation:

The molecule that has a stronger force of attraction between ammonia and methylamine and the reasons for the same is to be determined. Also, based on the reasons, list the other experiment that is done with these molecules to test the same hypothesis is to be determined.

Conceptual introduction:

The force of attraction between the hydrogen and an electronegative atom is called hydrogen bonding.

The force of attraction between the same atoms of different molecules is called van der Waals force of attraction.

The force of attraction between the charged ion and a polar compound is called ionic-dipole interaction.

The force of attraction between the two polar compounds is called as dipole-dipole interaction.

To determine:

The molecule that has a stronger force of attraction from ammonia and methylamine and the reasons for the same.

Expert Solution & Answer
Check Mark

Answer to Problem 1DE

Solution: The molecule that has a stronger force of attraction from ammonia and methylamine is methylamine and the reasons for the same are stated below.

Explanation of Solution

The force of attraction between the hydrogen and an electronegative atom is called hydrogen bonding.

Nitrogen is an electronegative atom compared to hydrogen. Therefore, there exist the hydrogen bonding interaction between the nitrogen of one ammonia molecule and the hydrogen of another ammonia molecule.

Thus, the liquification of ammonia gas is easier.

According to the given data, methylamine is liquefied more easily than ammonia, since, the boiling point of ammonia is less than that of methylamine.

Therefore, the interaction between the two methylamine molecules is stronger than that between two ammonia molecules.

The reason for this is that the interaction between the two methylamine molecules other than hydrogen bonding exist, that is, van der Waals forces. This is due to the hydrophobic regions of the two different molecules and the dipole-dipole interaction present between the carbon and the nitrogen atom in a molecule.

The solubility of a salt of methyl ammine is stronger than that of ammonia, since in methylammonium ion, the positive charge is stabilized by the positive inductive effect of the methyl group. This effect is absent in an ammonium ion.

The pKa of protonated ammonia and protonated methylamine is 9.26 and 10.66 , respectively.

Therefore, ammonia is less basic than methylamine. This is due to the inductive effect of methyl group that pushes electrons to extract a proton much easily. This effect is absent in ammonia.

Conclusion

Methylamine has stronger intermolecular force of attraction between its two molecule compared to that of ammonia.

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Chapter 11 Solutions

Laboratory Experiments for Chemistry: The Central Science (14th Edition)

Ch. 11.7 - Liquid crystalline phases are produced by which of...Ch. 11.7 - Prob. 11.6.2PECh. 11 - Prob. 1DECh. 11 - Prob. 1ECh. 11 - Prob. 2ECh. 11 - Prob. 3ECh. 11 - If 42.0 kj of heat is added to a 32.0-g sample of...Ch. 11 - Prob. 5ECh. 11 - The molecules have the same molecular formula...Ch. 11 - Prob. 7ECh. 11 - Prob. 8ECh. 11 - Prob. 9ECh. 11 - Prob. 10ECh. 11 - Prob. 11ECh. 11 - Prob. 12ECh. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Prob. 15ECh. 11 - Prob. 16ECh. 11 - Describe the intermolecular forces that must be...Ch. 11 - Prob. 18ECh. 11 - List the following molecules in order of...Ch. 11 - True or false: a. For molecules with similar...Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - Prob. 25ECh. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - A number of salts containing the tetrahedral...Ch. 11 - Prob. 32ECh. 11 - a. What is the relationship between surface...Ch. 11 - Prob. 34ECh. 11 - Prob. 35ECh. 11 - Prob. 36ECh. 11 - The boiling points, surface tension, and...Ch. 11 - Prob. 38ECh. 11 - Prob. 39ECh. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - Prob. 42ECh. 11 - 11.43 For many years drinking water has been...Ch. 11 - Prob. 44ECh. 11 - Prob. 45ECh. 11 - The fluorocarbon compound C2 Cl 3£'y has a normal...Ch. 11 - 11.47 Indicate whether each statement is true or...Ch. 11 - Prob. 48ECh. 11 - 11,49 Which of the following affects the vapor...Ch. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - Prob. 53ECh. 11 - Prob. 54ECh. 11 - Prob. 55ECh. 11 - Prob. 56ECh. 11 - Prob. 57ECh. 11 - Prob. 58ECh. 11 - Prob. 59ECh. 11 - Prob. 60ECh. 11 - Prob. 61ECh. 11 - Prob. 62ECh. 11 - Prob. 63ECh. 11 - Prob. 64ECh. 11 - In terms of the arrangement and freedom of motion...Ch. 11 - Prob. 66ECh. 11 - Prob. 67ECh. 11 - Prob. 68ECh. 11 - Prob. 69ECh. 11 - Prob. 70ECh. 11 - Prob. 71ECh. 11 - Prob. 72ECh. 11 - Prob. 73AECh. 11 - Prob. 74AECh. 11 - Prob. 75AECh. 11 - Prob. 76AECh. 11 - Prob. 77AECh. 11 - The table below shows the normal boiling points of...Ch. 11 - Prob. 79AECh. 11 - Prob. 80AECh. 11 - Prob. 81AECh. 11 - Prob. 82AECh. 11 - Prob. 83AECh. 11 - Prob. 84AECh. 11 - Prob. 85AECh. 11 - Prob. 86AECh. 11 - Prob. 87AECh. 11 - Prob. 88AECh. 11 - Prob. 89AECh. 11 - Prob. 90IECh. 11 - Prob. 91IECh. 11 - Prob. 92IECh. 11 - 11.93 The vapor pressure of ethanol (C2H5OH) at 19...Ch. 11 - Prob. 94IECh. 11 - Prob. 95IECh. 11 - Prob. 96IECh. 11 - Prob. 97IE
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