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Exam 2: Acids and Bases

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Question 1

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Rank the following compounds in order of increasing acidity, putting the least acidic first. $\begin{array} { c c c c } \mathrm { CH } _ { 3 } \mathrm { COOH } & \mathrm { ClCH } _ { 2 } \mathrm { COOH } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { ClCH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH } \\\text { I } & \text { II } & \text { III } & \text { IV }\end{array}$

A) III < I < IV < II
B) III < IV < I < II
C) II < I < IV < III
D) III < I < II < IV

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

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Question 2

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What is the correct classification of the following compound? CH₃-O-CH₃

A) Brønsted-Lowry acid and Lewis acid.
B) Brønsted-Lowry base and Lewis base.
C) Brønsted-Lowry base.
D) Lewis base.

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

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Question 3

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Which of the following species is the conjugate base of methanol, CH₃OH?

Rank the following conjugate bases in order of decreasing basicity, putting the most basic first. $\begin{array} {llll}\mathrm { H } _ { 2 } \mathrm { C } = ^\Theta { \mathrm { CH } }&\mathrm { HC} \equiv \mathrm {^\Theta C }&^\Theta _ { \mathrm { CH } _ { 3 } }\\\text { I }&\text { II } &\text { III } \\ \end{array}$

Which of the following statements about Brønsted-Lowry acids and bases is true?

Which of the following species is the conjugate acid of ammonia, NH₃?

Which of the following statements explain why H₂O is a stronger acid than CH₄?

Which of the following statements is a correct definition for a Brønsted-Lowry acid?

Rank the following compounds in order of increasing acidity, putting the least acidic first. $\begin{array} { c c c c } \mathrm { CH } _ { 3 } \mathrm { COOH } & \mathrm { FCH } _ { 2 } \mathrm { COOH } & \mathrm { ClCH } _ { 2 } \mathrm { COOH } & \mathrm { BrCH } _ { 2 } \mathrm { COOH } \\\text { I } & \text { II } & \text { III } & \text { IV }\end{array}$

Which is the conjugate base in the following reaction? $\begin{array} { l } \mathrm { HCl } &+& \mathrm { H } _ { 2 } \mathrm { O } ?&\mathrm { Cl } ^ { \ominus } &+& \mathrm { H } _ { 3 } \mathrm { O }^ { \oplus } \\\text { I }&&\text { II } &\text { III } &&\text { IV } \\\end{array}$

Which of the following compounds is the strongest acid? $\begin{array} { l } \mathrm { CH } _ { 4 }&\mathrm { CH } _ { 3 } \mathrm { CH } _ { 3 }&\mathrm { H } _ { 2 } \mathrm { C } = \mathrm { CH } _ { 2 }&\mathrm { HC } \equiv \mathrm { CH }\\\text { I }&\text { II } &\text { III } &\text { IV } \\\end{array}$

Which of the following compounds is the weakest acid?

Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH₃COOH) and ethanol (CH₃CH₂OH) ?

Which of the following compounds has the lowest pK_a?

Rank the following conjugate bases in order of increasing basicity, putting the least basic first. $\begin{array} {llll} \Theta _ { \mathrm { NH } _ { 2 } }&\mathrm { HO } ^ { \ominus }&\Theta _ { \mathrm { CH } _ { 3 } }\\ \text { I }&\text { II } &\text { III } \\ \end{array}$

Which of the following species is not a Brønsted-Lowry base?

Which is the conjugate acid in the following reaction? $\begin{array} { l } \mathrm { HCl } &+& \mathrm { H } _ { 2 } \mathrm { O } ?&\mathrm { Cl } ^ { \ominus } &+& \mathrm { H } _ { 3 } \mathrm { O }^ { \oplus } \\\text { I }&&\text { II } &\text { III } &&\text { IV } \\\end{array}$

Which of the following species cannot act as both a Brønsted-Lowry acid and base?

Which of the following statements about acid strength is true?

Which of the following species is the strongest base?