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4. How many mL of 2.0M boric acid solution must be added to 600ML of a 0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

4. How many mL of 2.0M boric acid solution must be added to 600ML of a 0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

Chemistry
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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II. Solve the following problems: 1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M Na,SO,? 2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K. -11 of HCO, = 4.7 x 10" 3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12 4. How many mL of 2.0M boric acid solution must be added to 600mL of a 0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24
Transcribed Image Text:II. Solve the following problems: 1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M Na,SO,? 2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K. -11 of HCO, = 4.7 x 10" 3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12 4. How many mL of 2.0M boric acid solution must be added to 600mL of a 0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24
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