Choose (please circle) the most effective buffer at pH 4.75 from the following. 1. 0.20M sodium benzoate 0.20 M benzoic acid (Ka = 6.28 × 10−5) 2. 0.020M sodium benzoate and 0.020 M sodium acetate 3. 0.20 M sodium acetate and 0.20 M acetic acid (Ka = 1.75 × 10−5) 4. 0.02 M sodium acetate and 0.02 M acetic acid (Ka = 1.75 × 10−5)
Choose (please circle) the most effective buffer at pH 4.75 from the following. 1. 0.20M sodium benzoate 0.20 M benzoic acid (Ka = 6.28 × 10−5) 2. 0.020M sodium benzoate and 0.020 M sodium acetate 3. 0.20 M sodium acetate and 0.20 M acetic acid (Ka = 1.75 × 10−5) 4. 0.02 M sodium acetate and 0.02 M acetic acid (Ka = 1.75 × 10−5)
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section17.2: Controlling Ph: Buffer Solutions
Problem 2RC: 2. If an acetic acid/sodium acetate buffer solution is prepared from 100. mL of 0.10 M acetic acid...
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Choose (please circle) the most effective buffer at pH 4.75 from the following.
1. 0.20M sodium benzoate 0.20 M benzoic acid (Ka = 6.28 × 10−5)
2. 0.020M sodium benzoate and 0.020 M sodium acetate
3. 0.20 M sodium acetate and 0.20 M acetic acid (Ka = 1.75 × 10−5)
4. 0.02 M sodium acetate and 0.02 M acetic acid (Ka = 1.75 × 10−5)
1. 0.20M sodium benzoate 0.20 M benzoic acid (Ka = 6.28 × 10−5)
2. 0.020M sodium benzoate and 0.020 M sodium acetate
3. 0.20 M sodium acetate and 0.20 M acetic acid (Ka = 1.75 × 10−5)
4. 0.02 M sodium acetate and 0.02 M acetic acid (Ka = 1.75 × 10−5)
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