Chem 129 Topic Set 7 Variations of titration and Buffers G. How would you make 350mL of a buffer with a total concentration of 0.75M and a pH of 9.00 from the list of materials below? (your answer should include the volumes of two solutions and the amount of DI water needed to reach the total volume) [remember: vol* total conc->total moles->moles weak, targetpH->ratio->stoich->moles strong] i. A solution of 1.25 M hydrochloric acid ii. A solution of 1.25 M sodium hydroxide iii. A solution of 1.25 M chloroacetic acid (pKa = 2.85) iv. A solution of 1.25 M ammonia (pka = 9.25) v. A solution of 1.25 M carbonic acid (pKa1 = 6.37, pKa2 = 10.32 vi. A solution of 1.25 M acetic acid (pka = 4.75) Dilutionen 1) What would be the volume of weak component and what would be the volume of strong component? MV MV (0.75) (350) = 1.25 (x) Polypraticac x = 210 mL 2) What would be the capacity of the buffer? idic behavig 3) After the buffer is made, what would the pH change to if 24.5mL of 1.25 M hydrochloric acid is added?

Chem 129 Topic Set 7 Variations of titration and Buffers G. How would you make 350mL of a buffer with a total concentration of 0.75M and a pH of 9.00 from the list of materials below? (your answer should include the volumes of two solutions and the amount of DI water needed to reach the total volume) [remember: vol* total conc->total moles->moles weak, targetpH->ratio->stoich->moles strong] i. A solution of 1.25 M hydrochloric acid ii. A solution of 1.25 M sodium hydroxide iii. A solution of 1.25 M chloroacetic acid (pKa = 2.85) iv. A solution of 1.25 M ammonia (pka = 9.25) v. A solution of 1.25 M carbonic acid (pKa1 = 6.37, pKa2 = 10.32 vi. A solution of 1.25 M acetic acid (pka = 4.75) Dilutionen 1) What would be the volume of weak component and what would be the volume of strong component? MV MV (0.75) (350) = 1.25 (x) Polypraticac x = 210 mL 2) What would be the capacity of the buffer? idic behavig 3) After the buffer is made, what would the pH change to if 24.5mL of 1.25 M hydrochloric acid is added?

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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