pH of basic buffer when strong acid is added to it 7. (a) Find the pH of a buffer solution (A buffered solution contains 0.25 M aqueous ammonia (Kb = 1.8*10-5) and 0.40 M ammonium chloride) when 0.10 mol of hydrochloric acid is added to 1.0 L of the solution. (b) Find % dissociation of the base.
pH of basic buffer when strong acid is added to it 7. (a) Find the pH of a buffer solution (A buffered solution contains 0.25 M aqueous ammonia (Kb = 1.8*10-5) and 0.40 M ammonium chloride) when 0.10 mol of hydrochloric acid is added to 1.0 L of the solution. (b) Find % dissociation of the base.
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter8: Acids And Bases
Section: Chapter Questions
Problem 8.55P: 8-55 We commonly refer to a buffer as consisting of approximately equal molar amounts of a weak acid...
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Transcribed Image Text:pH of basic buffer when strong acid is added to it
7. (a) Find the pH of a buffer solution (A buffered solution contains 0.25 M aqueous
ammonia (K = 1.8*10-5) and 0.40 M ammonium chloride) when 0.10 mol of
hydrochloric acid is added to 1.0 L of the solution.
(b) Find % dissociation of the base.
Preparation of a buffer
8. Make a buffer for pH = 4.30. The Ka of chloroacetic acid is 1.35*10-³. Is this acid a
good choice to make a buffer at pH 4.30?
9. Choose one of the following acids and its conjugate base to make buffer at pH 4.30.
acid
(a) propanoic acid
(b) benzoic acid
(c) hypochlorous acid
Ka
1.3*10-5
6.4*10-5
3.5*10-8
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