A buffer solution is prepared by combining equal volumes of solutions of 0.2 M NaH2PO4 and 0.2 M K2HPO4. The pH of the buffer is measured as 6.87. A small amount of NaOH is added to the buffer. Which statement accurately describes what happens when the NaOH is added? а. The OH- reacts with some of the HPO4²- to make more H2PO4 and the pH decreases slightly The OH reacts with some of the HPO44- to make more H2PO4 and the pH increases slightly b. С. The strong base OH- causes the pH to increase significantly The OH reacts with some of the H2PO4¯ to make more HPO44- and the pH increases slightly d. The OH reacts with some of the H2PO4¯ to make more HPO42- and the pH decreases slightly е.

A buffer solution is prepared by combining equal volumes of solutions of 0.2 M NaH2PO4 and 0.2 M K2HPO4. The pH of the buffer is measured as 6.87. A small amount of NaOH is added to the buffer. Which statement accurately describes what happens when the NaOH is added? а. The OH- reacts with some of the HPO4²- to make more H2PO4 and the pH decreases slightly The OH reacts with some of the HPO44- to make more H2PO4 and the pH increases slightly b. С. The strong base OH- causes the pH to increase significantly The OH reacts with some of the H2PO4¯ to make more HPO44- and the pH increases slightly d. The OH reacts with some of the H2PO4¯ to make more HPO42- and the pH decreases slightly е.

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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6
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