Question 1

Which of the following is the strongest base?

Accepted Answer

A)   CH3NH2
B)   NaNO3
C)   B(OH) 3
D)   Al(OH) 3
E)   LiOHF) A) and E)
G) None of the above

Question 2

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) A) and E)
G) B) and E)

Question 3

If a strong acid such as HCl is diluted sufficiently with water, the pH will be higher than 7.

Accepted Answer

A) True 
 B)False

Question 4

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 are correct.F) A) and C)
G) B) and D)

Question 5

What is the pH of a 0.050 M HBr solution?

Accepted Answer

A)   0.89
B)   1.12
C)   1.30
D)   3.00
E)   None of these choices are correct.F) D) and E)
G) B) and E)

Question 6

A solution of sodium acetate (CH3COONa) in water is weakly basic.

Accepted Answer

A) True 
 B)False

Question 7

A solution is prepared by adding 0.10 mol of potassium chloride, KCl, 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)   One needs to know the temperature before any of these predictions can be made.
E)   The values for Ka and Kb for the species in solution must be known before a prediction can be made.F) A) and D)
G) B) and D)

Question 8

What is the pOH of a 0.0085 M KOH solution?

Accepted Answer

A)   2.07
B)   4.77
C)   9.23
D)   11.93
E)   None of these choices are correct.F) B) and C)
G) A) and D)

Question 9

Which of the following aqueous systems has the highest pH?

Accepted Answer

A)   0.1 M HA, pKa = 11.89
B)   0.1 M HMO, pKa = 8.23
C)   0.1 M HA, pKa = 4.55
D)   0.1 M HBO, pKa = 2.43
E)   pure waterF) B) and C)
G) A) and E)

Question 10

Which one of the following substances will give an aqueous solution of pH < 7?

Accepted Answer

A)   KI 
B)   NH4Br
C)   Na2CO3
D)   CH3COONa
E)   CH3OHF) None of the above
G) B) and E)

Question 11

What is the pH of a 0.010 M triethanolammonium chloride, (HOC2H2) 3NHCl, solution? Kb, ((HOC2H2) 3N)  = 5.9 × 10-7

Accepted Answer

A)   2.75
B)   4.89
C)   9.11
D)   11.25
E)   None of these choices are correct.F) B) and E)
G) None of the above

Question 12

A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, 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 fluoride ions and sodium ions will be identical.
E)   The concentration of fluoride ions will be greater than the concentration of sodium ions.F) C) and D)
G) A) and B)

Question 13

What is the value of Kb for the cyanide anion, CN-? Ka(HCN)  = 6.2 × 10-10

Accepted Answer

A)   1.6 × 10-4 
B)   1.6 × 10-5
C)   3.8 × 10-4
D)   3.8 × 10-5
E)   6.2 × 104F) D) and E)
G) A) and E)

Question 14

A 0.050 M solution of the weak acid HA has [H3O+] = 3.77 × 10-4 M. What is the Ka for the acid?

Accepted Answer

A)   7.5 × 10-3 M
B)   2.8 × 10-6 M
C)   7.0 × 10-7 M
D)   7.0 × 10-8 M
E)   2.6 × 10-11 MF) All of the above
G) A) and E)

Question 15

Which of the following aqueous liquids is the most acidic?

Accepted Answer

A)   0.1 M Al(NO3) 3, Ka = 1 × 10-5
B)   0.1 M Be(NO3) 2, Ka = 4 × 10-6
C)   0.1 M Pb(NO3) 2, Ka = 3 × 10-8
D)   0.1 M Ni(NO3) 2, Ka = 1 × 10-10
E)   pure waterF) C) and D)
G) A) and B)

Question 16

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) B) and C)
G) A) and C)

Question 17

Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH4Cl, is correct?

Accepted Answer

A)   The solution is weakly basic.
B)   The solution is strongly basic.
C)   The solution is neutral.
D)   The solution is acidic.
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.F) A) and E)
G) A) and B)

Question 18

Select the strongest acid from the following list.

Accepted Answer

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

Question 19

What is the pH of a 0.00200 M HClO4 solution?

Accepted Answer

A)   0.995
B)   1.378
C)   2.699
D)   6.215
E)   None of these choices are correct.F) All of the above
G) A) and E)

Question 20

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, 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 weakly acidic.
D)   The solution is strongly acidic.
E)   The values for Ka and Kb for the species in solution must be known before a prediction can be made.F) A) and E)
G) B) and E)

Exam 18: Acid-Base Equilibria

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

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If a strong acid such as HCl is diluted sufficiently with water, the pH will be higher than 7.

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Which of the following is the strongest base?

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What is the value of Kb for the cyanide anion, CN-? Ka(HCN) = 6.2 × 10-10

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What is the pOH of a 0.0085 M KOH solution?

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What is the pH of a 0.050 M HBr solution?

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Which one of the following substances will give an aqueous solution of pH < 7?

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What is the pH of a 0.010 M triethanolammonium chloride, (HOC2H2) 3NHCl, solution? Kb, ((HOC2H2) 3N) = 5.9 × 10-7

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Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH4Cl, is correct?

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A solution of sodium acetate (CH3COONa) in water is weakly basic.

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Which of the following aqueous systems has the highest pH?

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Select the strongest acid from the following list.

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What is the pH of a 0.00200 M HClO4 solution?

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A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, to 1.00 L of water. Which statement about the solution is correct?

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?

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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 Ka for the acid?

Correct AnswerverifiedShow Answer

A 0.050 M solution of the weak acid HA has [H3O+] = 3.77 × 10-4 M. What is the Ka for the acid?

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A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, to 1.00 L of water. Which statement about the solution is correct?

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Which of the following aqueous liquids is the most acidic?

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Which of the following aqueous liquids will have the highest pH?

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What is the value of K_b for the cyanide anion, CN-? _K_a(HCN) = 6.2 × 10^-10

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What is the pH of a 0.010 M triethanolammonium chloride, (HOC₂H₂) ₃NHCl, solution? K_b, ((HOC₂H₂) ₃N) = 5.9 × 10^-7

Correct Answer
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Ammonium chloride is used as an electrolyte in dry cells. Which of the following statements about a 0.10 M solution of NH₄Cl, is correct?

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A solution of sodium acetate (CH₃COONa) in water is weakly basic.

Correct Answer
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What is the pH of a 0.00200 M HClO₄ solution?

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A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO₃, to 1.00 L of water. Which statement about the solution is correct?

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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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 0.050 M solution of the weak acid HA has [H₃O⁺] = 3.77 × 10^-4 M. What is the K_a for the acid?

Correct Answer
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