7. You have 1.0 L of 100 mM K₂HPO, solution. What volume of 1.0 M HCI must be added to adjust the pH of the solution to 6.77? H₂PO4 + H₂O ⇒ H₂O* + H₂PO¡¯ ⇒ H₂O* + HPO³ = H₂O* + PO³ The pk, values for these equilibria are 2.14, 6.86, and 12.4 A. 6 mL B. 17 mL C. 32 mL D. 55 mL 98 mL

7. You have 1.0 L of 100 mM K₂HPO, solution. What volume of 1.0 M HCI must be added to adjust the pH of the solution to 6.77? H₂PO4 + H₂O ⇒ H₂O* + H₂PO¡¯ ⇒ H₂O* + HPO³ = H₂O* + PO³ The pk, values for these equilibria are 2.14, 6.86, and 12.4 A. 6 mL B. 17 mL C. 32 mL D. 55 mL 98 mL

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter15: Complex Ion And Precipitation Equilibria

Section: Chapter Questions

Problem 76QAP

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