Calculate the pH of a solution containing a salt AcNa derived from a strong base (NaOH) and a weak acid (AcH), like CH3COONa, KF, NaNO2 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: AcNa → Ac- + Na+, for instance: CH3COONa → CH3COO- + Na+ 2. the hydrolysis of the water Ac- + H2O ⇌ AcH + OH-, for example: CH3COO- + H2O ⇌ CH3COOH + OH- knowing that the initial concentration of the salt is 1.75 M and the acid dissociation constant, Ka , is 2.07e-7. What is the PH?
Calculate the pH of a solution containing a salt AcNa derived from a strong base (NaOH) and a weak acid (AcH), like CH3COONa, KF, NaNO2 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: AcNa → Ac- + Na+, for instance: CH3COONa → CH3COO- + Na+ 2. the hydrolysis of the water Ac- + H2O ⇌ AcH + OH-, for example: CH3COO- + H2O ⇌ CH3COOH + OH- knowing that the initial concentration of the salt is 1.75 M and the acid dissociation constant, Ka , is 2.07e-7. What is the PH?
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 107AP
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Calculate the pH of a solution containing a salt AcNa derived from a strong base (NaOH) and a weak
acid (AcH), like CH3COONa, KF, NaNO2 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:
AcNa → Ac- + Na+, for instance: CH3COONa → CH3COO- + Na+
2. the hydrolysis of the water
Ac- + H2O ⇌ AcH + OH-, for example: CH3COO- + H2O ⇌ CH3COOH + OH-
knowing that the initial concentration of the salt is 1.75 M
and the acid dissociation constant, Ka , is 2.07e-7. What is the PH?
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