I need help understanding why the ratio of Acetate:Acetic acid = 3.5:1 and why the total amount would be 4.5. The question was calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30. The pka of acetic is 4.76. Where is the 1 coming from in the ratio 3.5:1

I need help understanding why the ratio of Acetate:Acetic acid = 3.5:1 and why the total amount would be 4.5. The question was calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30. The pka of acetic is 4.76. Where is the 1 coming from in the ratio 3.5:1

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

Chapter15: Acid-base Equilibria

Section: Chapter Questions

Problem 20Q: Consider the following two acids: pKa1 = 2.98; pKa2 = 13.40 HO2CCH2CH2CH2CH2CO2H Adipic acid pKa1 =...

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Consider the following two acids: pKa1 = 2.98; pKa2 = 13.40 HO2CCH2CH2CH2CH2CO2H Adipic acid pKa1 = 4.41; pKa2 = 5.28 In two separate experiments the pH was measured during the titration of 5.00 mmol of each acid with 0.200 M NaOH. Each experiment showed only one stoichiometric point when the data were plotted. In one experiment the stoichiometric point was at 25.00 mL added NaOH, and in the other experiment the stoichiometric point was at 50.00 mL NaOH. Explain these results.
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