Chapter 2.10, Problem 31P

For each of the following compounds (shown in their acidic forms), write the form that will predominate in a solution of pH = 5.5:

1. a. CH₃COOH (pK_a = 4.76)
2. b. CH₃CH₂ $\stackrel{+}{\text{N}}$H₃ (pK_a = 11.0)
3. c. H³O⁺ (pK_a = −1.7)
4. d. HBr (pK_a = −9)
5. e. ⁺NH₄ (pK_a = 9.4)
6. f. HC : N (pKa = 9.1)
7. g. HNO₂ (pK_a = 3.4)
8. h. HNO₃ (pK_a = −1.3)