Liquid ammonia (anhydrous NH3(l)) is often used as a solvent. Like water, ammonia undergoes autoionization by the transfer of a proton: 2NH3 NH4+ + NH2- K = 1×10-33 at -50°C Since ammonia is better proton acceptor than water, the ionization of acids is relatively enhanced in liquid ammonia. For example, acetic acid is a strong acid in liquid ammonia. a) Estimate [NH4+] (mol/L) in pure (i.e. neutral) liquid ammonia at -50°C. b) Calculate [NH4+] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C. c) Estimate [NH2-] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C.
Liquid ammonia (anhydrous NH3(l)) is often used as a solvent. Like water, ammonia undergoes autoionization by the transfer of a proton: 2NH3 NH4+ + NH2- K = 1×10-33 at -50°C Since ammonia is better proton acceptor than water, the ionization of acids is relatively enhanced in liquid ammonia. For example, acetic acid is a strong acid in liquid ammonia. a) Estimate [NH4+] (mol/L) in pure (i.e. neutral) liquid ammonia at -50°C. b) Calculate [NH4+] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C. c) Estimate [NH2-] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C.
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...
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Liquid ammonia (anhydrous NH3(l)) is often used as a solvent. Like water, ammonia undergoes autoionization by the transfer of a proton:
| 2NH3 NH4+ + NH2- K = 1×10-33 at -50°C |
Since ammonia is better proton acceptor than water, the ionization of acids is relatively enhanced in liquid ammonia. For example, acetic acid is a strong acid in liquid ammonia.
a) Estimate [NH4+] (mol/L) in pure (i.e. neutral) liquid ammonia at -50°C.
b) Calculate [NH4+] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C.
c) Estimate [NH2-] (mol/L) in a 6.29×10-2 M solution of acetic acid in liquid ammonia at -50°C.
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