Consider the Weak Bases Below and Their K_b Values Arrange the Conjugate Acids of These Weak Bases in Order

question 142

Multiple Choice

Consider the weak bases below and their K_b values: $\begin{array}{ll}\mathrm{C}_{6} \mathrm{H}_{7} \mathrm{O} & \mathrm{~K}_{\mathrm{b}}=1.3 \times 10^{-10} \\\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2} & \mathrm{~K}_{\mathrm{b}}=5.6 \times 10^{-4} \\\mathrm{C}_{5} \mathrm{H}_{5} \mathrm{~N} & \mathrm{~K}_{\mathrm{b}}=1.7 \times 10^{-9}\end{array}$ Arrange the conjugate acids of these weak bases in order of increasing acid strength.

• A) C₅H₅NH⁺ < C₆H₇OH < C₂H₅NH
• B) C₆H₇OH < C₅H₅NH⁺ < C₂H₅NH
• C) C₅H₅NH⁺ < C₂H₅NH₃⁺ < C₆H₇OH
• D) C₆H₇OH < C₂H₅NH₃⁺< C₅H₅NH⁺
• E) C₂H₅NH₃⁺< C₅H₅NH⁺ < C₆H₇OH

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