Question 1

What is the pH of a 0.0125 M NaOH solution?

Accepted Answer

A)   0.972
B)   1.903
C)   12.097
D)   13.028
E)   None of these choices is correct.F) A) and B)
G) B) and D)

Question 2

The substance HCl 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) A) and D)
G) C) and E)

Question 3

Which of the following pairs has the stronger acid listed first?

Accepted Answer

A)   H2AsO3, H2AsO4
B)   HI, HBr
C)   HClO, HClO3
D)   H2S, HCl
E)   H2SO3, H2SO4F) A) and D)
G) A) and C)

Question 4

Select the pair of substances in which an acid is listed followed by its conjugate base.

Accepted Answer

A)   H+, HCl
B)   NH3, NH4+
C)   HPO42¯, H2PO4¯
D)   HCO3¯, CO32¯
E)   CH3COOH, CH3COOH2+F) D) and E)
G) A) and D)

Question 5

All Brønsted-Lowry bases have at least one lone pair of electrons.

Accepted Answer

A) True 
 B)False

Question 6

Which one of the following is a Lewis acid but not a Brønsted-Lowry acid?

Accepted Answer

A)   Fe3+
B)   H3O+
C)   HSO4¯
D)   NH3
E)   H2OF) B) and D)
G) B) and E)

Question 7

Describe what is meant by the "leveling effect." Use a real acid as an example, and write an appropriate equation.

Accepted Answer

In aqueous solution, the strongest acid ...

Question 8

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K1 = 2.5 *10¯4, K2 = 5.6 * 10¯8, and K3 = 3 *10¯13. What is the pH of a 0.500 M solution of arsenic acid?

Accepted Answer

A)   0.85
B)   1.96
C)   3.90
D)   4.51
E)   None of these choices is correct.F) D) and E)
G) A) and B)

Question 9

A solution is prepared by adding 0.10 mol of potassium acetate, KCH3COO, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)   The solution is basic.
B)   The solution is neutral.
C)   The solution is acidic.
D)   The concentrations of potassium ions and acetate ions will be identical.
E)   The concentration of acetate ions will be greater than the concentration of potassium ions.F) None of the above
G) A) and B)

Question 10

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Accepted Answer

A)   0.36
B)   2.4 *10¯2
C)   7.8 * 10¯3
D)   1.5 * 10¯5
E)   None of these choices is correct.F) A) and D)
G) A) and E)

Question 11

Kw = 1.0 *10¯14, regardless of temperature.

Accepted Answer

A) True 
 B)False

Question 12

Calcium oxide, CaO, also known as quick lime, will react with carbon dioxide to form calcium carbonate, CaCO3. Which species, if any, acts as a Lewis acid in the reaction?

Accepted Answer

A)   Ca2+
B)   O2¯
C)   CO2
D)   CaCO3
E)   None of the species acts as a Lewis acid in this reaction.F) A) and B)
G) B) and D)

Question 13

Select the strongest acid from the following list.

Accepted Answer

A)   HBrO4
B)   HClO
C)   HBrO2
D)   HBrO
E)   HIOF) A) and E)
G) C) and D)

Question 14

The substance Ba(OH) 2 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) C) and D)
G) B) and E)

Question 15

Which of the following is considered a Lewis acid?

Accepted Answer

A)   CH3NH2
B)   BCl3
C)   F¯
D)   BF4¯
E)   CH4F) A) and B)
G) None of the above

Question 16

Define an acid according to the Arrhenius theory, and write a balanced equation to support this definition.

Accepted Answer

An acid is a substance which c...

Question 17

Arrhenius bases raise the hydroxide ion concentration when dissolved in water.

Accepted Answer

A) True 
 B)False

Question 18

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Accepted Answer

A)   7.2 * 101
B)   0.16
C)   0.099
D)   0.0014
E)   0.00027F) C) and D)
G) None of the above

Question 19

Which of the following pairs has the stronger acid listed first?

Accepted Answer

A)   HBr, HI
B)   HClO2, HClO3
C)   H2SeO4, H2SeO3
D)   HNO2, HNO3
E)   HF, HClF) B) and D)
G) C) and D)

Question 20

What is the [OH¯] for a solution at 25  °\degree° C that has pH = 4.29?

Accepted Answer

A)   1.4 *10¯2 M
B)   5.l * 10¯5 M
C)   1.9 * 10¯10 M
D)   7.3 * 10¯13 M
E)   9.71 M F) A) and B)
G) B) and C)

Exam 18: Acid-Base Equilibria

Which of the following pairs has the stronger acid listed first?

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What is the pH of a 0.0125 M NaOH solution?

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Kw = 1.0 *10¯14, regardless of temperature.

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Which of the following is considered a Lewis acid?

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Describe what is meant by the "leveling effect." Use a real acid as an example, and write an appropriate equation.

Correct AnswerverifiedIn aqueous solution, the strongest acid ...View AnswerShow Answer

Calcium oxide, CaO, also known as quick lime, will react with carbon dioxide to form calcium carbonate, CaCO3. Which species, if any, acts as a Lewis acid in the reaction?

Correct AnswerverifiedShow Answer

Which one of the following is a Lewis acid but not a Brønsted-Lowry acid?

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Select the strongest acid from the following list.

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Arrhenius bases raise the hydroxide ion concentration when dissolved in water.

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Define an acid according to the Arrhenius theory, and write a balanced equation to support this definition.

Correct AnswerverifiedAn acid is a substance which c...View AnswerShow Answer

Which of the following pairs has the stronger acid listed first?

Correct AnswerverifiedShow Answer

A solution is prepared by adding 0.10 mol of potassium acetate, KCH3COO, to 1.00 L of water. Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K1 = 2.5 *10¯4, K2 = 5.6 * 10¯8, and K3 = 3 *10¯13. What is the pH of a 0.500 M solution of arsenic acid?

Correct AnswerverifiedShow Answer

All Brønsted-Lowry bases have at least one lone pair of electrons.

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The substance HCl is considered

Correct AnswerverifiedShow Answer

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Correct AnswerverifiedShow Answer

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Correct AnswerverifiedShow Answer

Select the pair of substances in which an acid is listed followed by its conjugate base.

Correct AnswerverifiedShow Answer

What is the [OH¯] for a solution at 25 °\degree° C that has pH = 4.29?

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The substance Ba(OH) 2 is considered

Correct AnswerverifiedShow Answer

Correct Answer
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K_w = 1.0 *10¯¹⁴, regardless of temperature.

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In aqueous solution, the strongest acid ...
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Calcium oxide, CaO, also known as quick lime, will react with carbon dioxide to form calcium carbonate, CaCO₃. Which species, if any, acts as a Lewis acid in the reaction?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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An acid is a substance which c...
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A solution is prepared by adding 0.10 mol of potassium acetate, KCH₃COO, to 1.00 L of water. Which statement about the solution is correct?

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Farmers who raise cotton once used arsenic acid, H₃AsO₄, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K₁ = 2.5 10¯⁴, K₂ = 5.6 10¯⁸, and K₃ = 3 *10¯¹³. What is the pH of a 0.500 M solution of arsenic acid?

Correct Answer
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Correct Answer
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Correct Answer
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Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the K_a for the acid?

Correct Answer
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A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of K_a for this acid?

Correct Answer
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Correct Answer
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What is the [OH¯] for a solution at 25 $\degree$ C that has pH = 4.29?

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The substance Ba(OH) ₂ is considered

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