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4. A 0.30 M solution of a salt NaA has pH-8.11. What is the value of K, for the parent acid HA? 5. A solution is made by adding 0.340 g Ca(OH)2(s), 40.0 mL of 1.25 M HNO3, and enough water to make a final volume of 100.0 mL. Assuming that all of the solid dissolves, what is the pH of the final solution? 6. (a) You have to prepare a pH 7.10 buffer, and you have the following 0.10M solutions available: HCOOH, CH₂COOH, H₂PO4, HCOONa, CH₂COONa, and Na₂HPO4. Which solution(s) would you use? (b) How many milliliters of the chosen solutions would you use to make 1 L of 0.1 M buffer?

4. A 0.30 M solution of a salt NaA has pH-8.11. What is the value of K, for the parent acid HA? 5. A solution is made by adding 0.340 g Ca(OH)2(s), 40.0 mL of 1.25 M HNO3, and enough water to make a final volume of 100.0 mL. Assuming that all of the solid dissolves, what is the pH of the final solution? 6. (a) You have to prepare a pH 7.10 buffer, and you have the following 0.10M solutions available: HCOOH, CH₂COOH, H₂PO4, HCOONa, CH₂COONa, and Na₂HPO4. Which solution(s) would you use? (b) How many milliliters of the chosen solutions would you use to make 1 L of 0.1 M buffer?

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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4. A 0.30 M solution of a salt NaA has pH-8.11. What is the value of K, for the parent acid HA? 5. A solution is made by adding 0.340 g Ca(OH)2(s), 40.0 mL of 1.25 M HNO3, and enough water to make a final volume of 100.0 mL. Assuming that all of the solid dissolves, what is the pH of the final solution? 6. (a) You have to prepare a pH 7.10 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH₂COONa, and Na₂HPO4. Which solution(s) would you use? (b) How many milliliters of the chosen solutions would you use to make 1 L of 0.1 M buffer?
Transcribed Image Text:4. A 0.30 M solution of a salt NaA has pH-8.11. What is the value of K, for the parent acid HA? 5. A solution is made by adding 0.340 g Ca(OH)2(s), 40.0 mL of 1.25 M HNO3, and enough water to make a final volume of 100.0 mL. Assuming that all of the solid dissolves, what is the pH of the final solution? 6. (a) You have to prepare a pH 7.10 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH₂COONa, and Na₂HPO4. Which solution(s) would you use? (b) How many milliliters of the chosen solutions would you use to make 1 L of 0.1 M buffer?
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