Chapter 10.12, Problem 4QQ

The chemical reaction that occurs when a HCN/CN⁻ buffer system responds to the addition of a small amount of acid is

1. a. $\text{HCN}+{\text{H}}_2\text{O }\stackrel{}{\to }{\text{ H}}_3{\text{O}}^{+}+{\text{CN}}^{-}$
2. b. ${\text{H}}_3{\text{O}}^{+}+{\text{OH}}^{-}\stackrel{}{\to }2{\text{H}}_2\text{O}$
3. c. ${\text{CN}}^{-}+{\text{H}}_3{\text{O}}^{+}\stackrel{}{\to }{\text{H}}_2\text{O}+\text{HCN}$
4. d. no correct response