2. A student titrates 25.00 mL of a 0.2560 F solution of sodium phosphate (Na3PO4) with 0.4000 M HCI. The K, values for phosphoric acid (H₂PO4) are: K₁₁ = 7.5 x 10-³, Ka₂ = 6.2 x 10-8, and Ka3 = 4.8 x 10-13. a. Calculate the pH of the solution before any hydrochloric acid is added (A: 12.80) b. Calculate the pH after 16.00 mL of HCI has been added (A: 9.76) c. Calculate the pH after 34.25 mL of HCI has been added (A: 2.91) d. Calculate the pH after 50.00 mL of HCL has been added (A: 1.972)

2. A student titrates 25.00 mL of a 0.2560 F solution of sodium phosphate (Na3PO4) with 0.4000 M HCI. The K, values for phosphoric acid (H₂PO4) are: K₁₁ = 7.5 x 10-³, Ka₂ = 6.2 x 10-8, and Ka3 = 4.8 x 10-13. a. Calculate the pH of the solution before any hydrochloric acid is added (A: 12.80) b. Calculate the pH after 16.00 mL of HCI has been added (A: 9.76) c. Calculate the pH after 34.25 mL of HCI has been added (A: 2.91) d. Calculate the pH after 50.00 mL of HCL has been added (A: 1.972)

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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