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Exam 2: Acids and Bases

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Question 1

Multiple Choice

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

A) Loss of a proton from a base forms its conjugate acid.
B) Loss of a proton from an acid forms its conjugate base.
C) Gain of a proton by an acid forms its conjugate base.
D) Brønsted-Lowry acid-base reactions always result in the transfer of a proton from a base to an acid.

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Question 2

Multiple Choice

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Rank the following compounds in order of increasing acidity, putting the least acidic first.

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

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Question 3

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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 ranks the compounds in order of increasing basicity, putting the least basic first?

What is the direction of equilibrium when acetylene (C₂H₂) reacts with H₂N^- in an acid-base reaction?

What is the direction of equilibrium when acetylene (C₂H₂) reacts with ethoxide (CH₃CH₂O^-) in an acid-base reaction?

What are the products of the following proton transfer reaction?

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

Rank the following compounds in order of decreasing acidity, putting the most acidic first.

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

Which of the following compounds is both a Brønsted-Lowry acid and base?

Which of the following statements about Lewis bases is true?

Which of the following concepts can be used to explain the difference in acidity between ethanol (CH₃CH₂OH) and 2-fluoroethanol (FCH₂CH₂OH) ?

Which of the following species is the strongest base?

What is the role of methylchloride (CH₃Cl) in the following reaction?

What is the correct rank of the following compounds in order of increasing acidity?

Rank the following conjugate bases in order of increasing basicity, putting the least basic first.

Which of the following compounds is the strongest acid?

Consider the following molecule with protons labeled, I-III.Rank these protons in order of decreasing acidity, putting the most acidic first.

Which of the following compounds is not a Lewis acid?