Calculate the pH of a solution containing a salt B Cl derived from a strong acid (HCl) and a weak Base (B OH), like NH4Cl, CH3NH3I, Ph-NH3Br and so on. In this case two processes have to be considered: 1. Dissociation of the salt, within the assumption that the salt is a strong electrolyte: B Cl → B + + Cl-, for instance: NH4Cl → NH4+ + Cl- 2. the hydrolysis of the water B + + H2O ⇌ B OH + H+, for example: NH4+ + H2O ⇌ NH4OH + H+ (often shown as NH4+ ⇌ NH3 + H+ ) knowing that the initial concentration of the salt is 1.67 M, and the base dissociation constant, Kb , is 8.43e-7.
Calculate the pH of a solution containing a salt B Cl derived from a strong acid (HCl) and a weak Base (B OH), like NH4Cl, CH3NH3I, Ph-NH3Br and so on. In this case two processes have to be considered: 1. Dissociation of the salt, within the assumption that the salt is a strong electrolyte: B Cl → B + + Cl-, for instance: NH4Cl → NH4+ + Cl- 2. the hydrolysis of the water B + + H2O ⇌ B OH + H+, for example: NH4+ + H2O ⇌ NH4OH + H+ (often shown as NH4+ ⇌ NH3 + H+ ) knowing that the initial concentration of the salt is 1.67 M, and the base dissociation constant, Kb , is 8.43e-7.
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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Calculate the pH of a solution containing a salt B Cl derived from a strong acid (HCl) and a weak
Base (B OH), like NH4Cl, CH3NH3I, Ph-NH3Br and so on. In this case two processes have to be considered:
1. Dissociation of the salt, within the assumption that the salt is a strong electrolyte:
B Cl → B + + Cl-, for instance: NH4Cl → NH4+ + Cl-
2. the hydrolysis of the water
B + + H2O ⇌ B OH + H+, for example: NH4+ + H2O ⇌ NH4OH + H+ (often shown as NH4+ ⇌ NH3 + H+ )
knowing that the initial concentration of the salt is 1.67 M,
and the base dissociation constant, Kb , is 8.43e-7.
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