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Exam 4: Acids and Bases

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Question 21

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Which of the following statements is not true?

A) The position of the equilibrium for an exergonic reaction favors products
B) The products of an exergonic reaction have a higher Gibbs free energy than the reactants.
C) The equilibrium constant of a reaction for which DG $\degree$ = 0 is 1.
D) DG $\degree$ = DH $\degree$ - TDS $\degree$

E) A) and C)
F) C) and D)

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Question 22

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Which of the following anions is the strongest base?

A) NH₂^-
B) NH₃
C) CH₃CH=N^-
D) CH₃CºN

E) C) and D)
F) A) and B)

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Question 23

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Which of the following compounds has the lowest pK_a?

The pK_a of HCl is -7. What is the value of the equilibrium constant, K_eq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M]

Which of the following is the strongest base?

What is the value of the equilibrium constant for the following equilibrium?

Complete the equation below for the protonation of 2-butene with HBr. Show the movement of pairs of electrons with curved arrows and provide the structures of the conjugate acid and conjugate base.

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

Which of the following compounds is the strongest acid?

Use curved arrows to show the movement of pairs of electrons in the following reaction between a Lewis acid and a Lewis base, and show the structure of the product.

Which of the following compounds is the strongest acid?

Use curved arrows to show the movement of pairs of electrons in the following acid-base reaction and show the structures of the conjugate acid and conjugate base.

Which of the following compounds is the strongest acid?

Which of the following compounds is the strongest acid?

The pK_a of acetic acid, CH₃COOH, is 4.76. What is the value of the equilibrium constant K_eq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M]

Which of the following has the highest bond dissociation energy?

Which of the following compounds is the strongest acid?

Complete the equation below for the protonation of cyclohexene with HCl. Show the movement of pairs of electrons with curved arrows and provide the structures of the conjugate acid and conjugate base.

Which of the following compounds is the strongest acid?

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