Please answer question 4 4. Some contact lens solutions use boric acid buffers to resist pH change. Over what pH range does boricacid have good buffering capacity? Show your work.5. You need to make a pH 6.5 buffer. Which of the following reagents would you choose to make thebuffer? Briefly explain.NazCOsNaHCOsHCINaOH6. Calculate the masses of NaH2PO4 H20 and NazHPO, 7H20 needed to make 100.0 mL of a 0.100 Mphosphate buffer with pH = 7.40Mass of NaH2PO4 H20 =,Mass of NazHPO4 7H20 =.

pH=pKa +log[salt]/acid pOH=pKb + log[salt]/base boric acid has formula H3BO3, it is a weak acid with…

Answered: 4. Some contact lens solutions use…

4. Some contact lens solutions use boric acid buffers to resist pH change. Over what pH range does boric acid have good buffering capacity? Show your work.

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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Question

Please answer question 4

4. Some contact lens solutions use boric acid buffers to resist pH change. Over what pH range does boric
acid have good buffering capacity? Show your work.
5. You need to make a pH 6.5 buffer. Which of the following reagents would you choose to make the
buffer? Briefly explain.
NazCOs
NaHCOs
HCI
NaOH
6. Calculate the masses of NaH2PO4 H20 and NazHPO, 7H20 needed to make 100.0 mL of a 0.100 M
phosphate buffer with pH = 7.40
Mass of NaH2PO4 H20 =,
Mass of NazHPO4 7H20 =.

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