Question 1

What is the [H3O+] for a solution at 25  °\degree° C that has pOH = 5.640?

Accepted Answer

A)   2.34 *10¯4 M
B)   2.29 * 10¯6 M
C)   4.37 * 10¯9 M
D)   4.27 * 10¯11 M
E)   8.360 M F) C) and D)
G) B) and E)

Question 2

Which of the following is a Lewis base?

Accepted Answer

A)   BCl3
B)   Cu2+
C)   Cl¯
D)   Mn2+
E)   NH4+F) A) and E)
G) B) and D)

Question 3

Formic acid, which is a component of insect venom, has a Ka = 1.8 * 10¯4. What is the [H3O+] in a solution that is initially 0.10 M formic acid, HCOOH?

Accepted Answer

A)   4.2 * 10¯3 M
B)   8.4 * 10¯3 M
C)   1.8 * 10¯4 M
D)   1.8 * 10¯5 M
E)   1.8 * 10¯6 MF) C) and D)
G) B) and C)

Question 4

Which, if any, of the following acids is strong?

Accepted Answer

A)   phosphoric
B)   carbonic
C)   acetic
D)   water
E)   None of these choices is correct.F) C) and D)
G) A) and B)

Question 5

All weak acids have strong conjugate bases.

Accepted Answer

A) True 
 B)False

Question 6

The substance H2SO3 is considered

Accepted Answer

A)   a weak Arrhenius base.
B)   a strong Arrhenius acid.
C)   a strong Arrhenius base.
D)   a neutral compound.
E)   a weak Arrhenius acid.F) A) and B)
G) None of the above

Question 7

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Accepted Answer

A)   CH3NH2
B)   NaOH
C)   CO2
D)   Ca(OH) 2
E)   CH4F) B) and C)
G) D) and E)

Question 8

Which one of the following pairs is not a conjugate acid-base pair?

Accepted Answer

A)   H2O, OH¯
B)   H2O2, HO2¯
C)   OH¯, O2¯
D)   H2PO4¯, HPO42¯
E)   HCl, H+F) B) and D)
G) A) and E)

Question 9

(p. 812 and other sections)  Which of the following aqueous liquids will have the highest pH?

Accepted Answer

A)   0.1 M CH3COOH, pKa = 4.7
B)   0.1 M CuCl2, pKa = 7.5
C)   0.1 M H3C6H5O7, pKa = 3.1
D)   0.1 M ZnCl2, pKa = 9.0
E)   pure waterF) A) and E)
G) C) and D)

Question 10

Which of the following is the strongest acid?

Accepted Answer

A)   CH3COOH
B)   HF
C)   H3PO4
D)   H2SO3
E)   H2SO4F) A) and C)
G) B) and D)

Question 11

An aqueous solution is considered to be acidic if

Accepted Answer

A)   the hydroxide ion concentration is 10¯6 M.
B)   the hydrogen ion concentration is 10¯8 M.
C)   the hydroxide and hydrogen ion concentrations are equal.
D)   the hydroxide ion concentration is greater than the hydrogen ion concentration.
E)   the hydroxide ion concentration is 10¯10 M.F) A) and E)
G) C) and D)

Question 12

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A)   0.12
B)   0.29
C)   0.63
D)   0.82
E)   > 1.0F) A) and B)
G) B) and E)

Question 13

What is the pH of a 0.050 M LiOH solution?

Accepted Answer

A)   
B)   1.30
C)   3.00
D)   11.00
E)   12.70F) B) and D)
G) B) and C)

Question 14

All strong acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False

Question 15

Select the strongest acid from the following list.

Accepted Answer

A)   HBrO
B)   HBrO2
C)   HClO2
D)   HClO3
E)   HIOF) C) and D)
G) A) and E)

Question 16

Consider the reaction: BF3 + F¯ $\rightarrow$ BF4¯
Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

Accepted Answer

Yes, according to Lewis, this ...

Question 17

The substance NaNO3 is considered

Accepted Answer

A)   a weak Arrhenius acid.
B)   a weak Arrhenius base.
C)   a strong Arrhenius acid.
D)   a strong Arrhenius base.
E)   a neutral compound.F) D) and E)
G) A) and B)

Question 18

What is the pOH of a 0.0250 M HI solution?

Accepted Answer

A)   0.944
B)   1.602
C)   12.398
D)   13.056
E)   None of these choices is correct.F) B) and D)
G) D) and E)

Question 19

The substance NH3 is considered

Accepted Answer

A)   a weak acid.
B)   a weak base.
C)   a strong acid.
D)   a strong base.
E)   a neutral compound.F) A) and E)
G) A) and B)

Question 20

Iodine trichloride, ICl3, will react with a chloride ion to form ICl4¯. Which species, if any, acts as a Lewis acid in this reaction?

Accepted Answer

A)   ICl4¯
B)   ICl3
C)   Cl¯
D)   the solvent
E)   None of the species acts as a Lewis acid in this reaction.F) B) and E)
G) A) and D)

Exam 18: Acid-Base Equilibria

What is the pOH of a 0.0250 M HI solution?

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Which of the following is the strongest acid?

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The substance H2SO3 is considered

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Iodine trichloride, ICl3, will react with a chloride ion to form ICl4¯. Which species, if any, acts as a Lewis acid in this reaction?

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An aqueous solution is considered to be acidic if

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The substance NH3 is considered

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Select the strongest acid from the following list.

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(p. 812 and other sections) Which of the following aqueous liquids will have the highest pH?

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Formic acid, which is a component of insect venom, has a Ka = 1.8 * 10¯4. What is the [H3O+] in a solution that is initially 0.10 M formic acid, HCOOH?

Correct AnswerverifiedShow Answer

What is the pH of a 0.050 M LiOH solution?

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What is the pH of a 0.75 M HNO3 solution?

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The substance NaNO3 is considered

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Which one of the following pairs is not a conjugate acid-base pair?

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What is the [H3O+] for a solution at 25 °\degree° C that has pOH = 5.640?

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Consider the reaction: BF3 + F¯ →\rightarrow→ BF4¯ Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

Correct AnswerverifiedYes, according to Lewis, this ...View AnswerShow Answer

All weak acids have strong conjugate bases.

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Which of the following is a Lewis base?

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Which, if any, of the following acids is strong?

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All strong acids have weak conjugate bases.

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Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

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The substance H₂SO₃ is considered

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Iodine trichloride, ICl₃, will react with a chloride ion to form ICl₄¯. Which species, if any, acts as a Lewis acid in this reaction?

Correct Answer
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The substance NH₃ is considered

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Formic acid, which is a component of insect venom, has a K_a = 1.8 * 10¯⁴. What is the [H₃O⁺] in a solution that is initially 0.10 M formic acid, HCOOH?

Correct Answer
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What is the pH of a 0.75 M HNO₃ solution?

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The substance NaNO₃ is considered

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What is the [H₃O⁺] for a solution at 25 $\degree$ C that has pOH = 5.640?

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Consider the reaction: BF₃ + F¯ $\rightarrow$ BF₄¯ Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

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Yes, according to Lewis, this ...
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