Exam 4: Acids and Bases

Place the following compounds in the order of their decreasing basicity: Guanidine, Urea, Amidine

Provide the equation for the equilibrium constant, K_eq, for the following equilibrium. $\mathrm{HA}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{A}^{-}+\mathrm{H}_{3} \mathrm{O}^{+}$

Gaseous HCl when dissolved in toluene is a _____.

Which of the following is the strongest acid?

In the following list, there are four Lewis acids, CH₃OH, HCl, BCl₃ and FeBr₃.

What is the value of the equilibrium constant for the following equilibrium? $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{CH}_{3} \mathrm{COOH}\rightleftharpoons$$\mathrm{CH}_{3} \mathrm{CH}_{2} \stackrel{+}{\mathrm{O}} \mathrm{H}_{2}+\mathrm{CH}_{3} \mathrm{CO}_{2}^{-}$ $\mathrm{p} K_{\mathrm{a}}=-4.76$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\mathrm{p} K_{\mathrm{a}}=-1.74$

Which of the following energy diagrams best represents the changes in energy during addition of HBr to an alkene?

Which of the following is a feature of a Lewis acid?

Which of the following terms describes the role of ethanol in the acid-base reaction shown?

Match the types of reactions with the most appropriate relationships. -ΔG_product > ΔG_reactant

Which of the following is the strongest base?

Which species is the conjugate acid in the following acid-base reaction?

Explain the highly basic nature of guanidine.

Which of the following is easiest to deprotonate?

Which of the following terms describes the role of ethyne in the acid-base reaction shown?

Which of the following has a pK_a value of approximately 16?

Provide a brief explanation, based on features of the molecules, for the following trend in pK_a values? CH₃CH₂OH > CH₃COOH 15.9 4.76

Which of the following is the strongest acid?

Which of the following anions is the strongest base?

Which of the following is the strongest acid?