Question 1

A solution with a hydroxide ion concentration of 4.15 × 10-6 mol L-1 is ________ and has a hydrogen ion concentration of ________.

Accepted Answer

A)   acidic; 2.41 × 10-8 mol L-1
B)   acidic; 2.41 × 10-9 mol L-1
C)   basic; 2.41 × 10-8 mol L-1
D)   basic; 2.41 × 10-9 mol L-1E) C) and D)
F) None of the above

Question 2

Which of the following is an Arrhenius acid?

Accepted Answer

A)   H2SO4
B)   LiOH
C)   NH2CH3
D)   CH3CH3
E)   NH3F) B) and E)
G) A) and B)

Question 3

Which of the following statements is TRUE?

Accepted Answer

A)   A strong acid is composed of a proton and an anion that have a very strong attraction for one another.
B)   A weak base is composed of a cation and an anion with a very weak attraction between them.
C)   A strong acid has a strong conjugate base.
D)   The conjugate base of a very weak acid is stronger than the conjugate base of a strong acid.
E)   The dissociation reaction of a weak acid is completely shifted to the right.F) B) and D)
G) B) and C)

Question 4

Determine the pH of a 0.116 mol L-1 Ba(OH) 2 solution at 25 °C.

Accepted Answer

A)   8.62
B)   13.06
C)   13.37
D)   0.63
E)   12.56F) D) and E)
G) A) and D)

Question 5

Find the percent ionization of a 0.200 mol L-1 solution of formic acid. The Ka of formic acid is 1.8 × 10-4.

Accepted Answer

A)   3.0%
B)   2.0%
C)   1.0%
D)   3.5%
E)   4.6%F) A) and D)
G) A) and B)

Question 6

Which one of the following will form a basic solution in water?

Accepted Answer

A)   NaBr
B)   LiCN
C)   NaCl
D)   KClO4
E)   NH4ClF) B) and E)
G) None of the above

Question 7

Which of the following is correct?

Accepted Answer

A)   The smaller the acid ionization constant is, the more the acid ionizes and the stronger the acid.
B)   The larger the acid ionization constant is, the less the acid ionizes and the weaker the acid.
C)   The smaller the acid ionization constant is, the less the acid ionizes and the weaker the acid.
D)   The smaller the acid ionization constant is, the less the acid ionizes and the weaker its conjugate base is.
E)   The smaller the acid ionization constant is, the more the acid ionizes and the weaker the acid.F) A) and B)
G) A) and C)

Question 8

Which of the following is TRUE?

Accepted Answer

A)   A neutral solution contains [H2O] = [H3O⁺]
B)   A neutral solution does not contain any H3O+ or OH-
C)   An acidic solution has [H3O⁺] > [OH⁻]
D)   A basic solution does not contain H3O+
E)   An acidic solution does not contain OH-F) A) and B)
G) A) and C)

Question 9

Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10-6 mol L-1 in hydroxide ion.

Accepted Answer

A)   4.00 × 10-7 mol L-1
B)   4.00 × 10-8 mol L-1
C)   4.00 × 10-9 mol L-1
D)   5.00 × 10-9 mol L-1E) None of the above
F) A) and B)

Question 10

Calculate the pH of a solution that contains 3.9 × 10-4 mol L-1 H3O⁺ at 25 °C.

Accepted Answer

A)   4.59
B)   3.41
C)   10.59
D)   9.41
E)   0.59F) A) and B)
G) A) and C)

Question 11

The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO)  is 3.0 × 10-8 . At equilibrium, the molarity of H3O+ in a 0.030 mol L-1 solution of HClO is ________.

Accepted Answer

A)   1.52 mol L-1
B)   3.3 × 10-10 mol L-1
C)   4.52 mol L-1
D)   0.030 mol L-1
E)   3.0 × 10-5 mol L-1F) D) and E)
G) A) and D)

Question 12

Calculate the concentration of bicarbonate ion, HCO3-, in a 0.0 10 mol L-1 H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Accepted Answer

A)   6.6 × 10-5 mol L-1
B)   4.3 × 10-7 mol L-1
C)   4.3 × 10-9 mol L-1
D)   5.6 × 10-11 mol L-1E) A) and D)
F) C) and D)

Question 13

Calculate the pOH of a solution that contains 2.4 × 10-5 mol L-1 H3O⁺ at 25 °C.

Accepted Answer

A)   2.40
B)   9.38
C)   4.62
D)   11.60
E)   4.17F) A) and B)
G) A) and C)

Question 14

Determine the pOH of a 0.116 mol L-1 Ba(OH) 2 solution at 25 °C.

Accepted Answer

A)   8.62
B)   13.06
C)   13.37
D)   0.63
E)   12.56F) C) and E)
G) None of the above

Question 15

Identify the weakest acid.

Accepted Answer

A)   HF
B)   HCl
C)   HBr
D)   HI
E)   All of the above are weak acids.F) A) and B)
G) A) and E)

Question 16

Which of the following is a conjugate acid-base pair?

Accepted Answer

A)   NH4+/NH3
B)   H3O⁺/OH⁻
C)   H2SO3/SO32⁻
D)   SO42-/SO32-
E)   NaOH/Na+F) A) and B)
G) B) and C)

Question 17

Determine the pH in a 0.435 mol L-1 LiOH solution.

Accepted Answer

A)   13.6
B)   0.24
C)   13.37
D)   0.6
E)   12F) A) and C)
G) A) and B)

Question 18

Which of the following is a Lewis base?

Accepted Answer

A)   AlF3
B)   H2O
C)   SiF4
D)   C5H12
E)   BH3F) B) and E)
G) A) and E)

Question 19

Determine the pOH of a 0.051 mol L-1 Sr(OH) 2 solution at 25 °C.

Accepted Answer

A)   8.62
B)   13.01
C)   13.37
D)   0.991
E)   12.56F) A) and B)
G) A) and E)

Question 20

Which of the following is a strong acid?

Accepted Answer

A)   C6H5CO2H
B)   HCN
C)   HClO4
D)   NH4+
E)   H2OF) A) and C)
G) A) and E)

Exam 15: Acids and Bases

Determine the pH in a 0.435 mol L-1 LiOH solution.

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Determine the pOH of a 0.051 mol L-1 Sr(OH) 2 solution at 25 °C.

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Calculate the concentration of bicarbonate ion, HCO3-, in a 0.0 10 mol L-1 H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

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Calculate the pOH of a solution that contains 2.4 × 10-5 mol L-1 H3O⁺ at 25 °C.

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A solution with a hydroxide ion concentration of 4.15 × 10-6 mol L-1 is ________ and has a hydrogen ion concentration of ________.

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Which of the following statements is TRUE?

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Which of the following is TRUE?

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Find the percent ionization of a 0.200 mol L-1 solution of formic acid. The Ka of formic acid is 1.8 × 10-4.

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Determine the pH of a 0.116 mol L-1 Ba(OH) 2 solution at 25 °C.

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Determine the pOH of a 0.116 mol L-1 Ba(OH) 2 solution at 25 °C.

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The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO) is 3.0 × 10-8 . At equilibrium, the molarity of H3O+ in a 0.030 mol L-1 solution of HClO is ________.

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Which of the following is correct?

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Calculate the pH of a solution that contains 3.9 × 10-4 mol L-1 H3O⁺ at 25 °C.

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Which one of the following will form a basic solution in water?

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Which of the following is a strong acid?

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Which of the following is an Arrhenius acid?

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Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10-6 mol L-1 in hydroxide ion.

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Which of the following is a conjugate acid-base pair?

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Which of the following is a Lewis base?

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Identify the weakest acid.

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Determine the pH in a 0.435 mol L^-1 LiOH solution.

Correct Answer
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Determine the pOH of a 0.051 mol L^-1 Sr(OH) ₂ solution at 25 °C.

Correct Answer
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Calculate the concentration of bicarbonate ion, HCO₃^-, in a 0.0 10 mol L^-1 H₂CO₃ solution that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

Correct Answer
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Calculate the pOH of a solution that contains 2.4 × 10^-5 mol L^-1 H₃O⁺ at 25 °C.

Correct Answer
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A solution with a hydroxide ion concentration of 4.15 × 10^-⁶ mol L^-1 is and has a hydrogen ion concentration of .

Correct Answer
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Find the percent ionization of a 0.200 mol L^-1 solution of formic acid. The K_a of formic acid is 1.8 × 10^-4.

Correct Answer
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Determine the pH of a 0.116 mol L^-1 Ba(OH) ₂ solution at 25 °C.

Correct Answer
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Determine the pOH of a 0.116 mol L^-1 Ba(OH) ₂ solution at 25 °C.

Correct Answer
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The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO) is 3.0 × 10^-8. At equilibrium, the molarity of H₃O⁺ in a 0.030 mol L^-1 solution of HClO is ________.

Correct Answer
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Correct Answer
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Calculate the pH of a solution that contains 3.9 × 10^-4 mol L^-1 H₃O⁺ at 25 °C.

Correct Answer
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Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10^-⁶ mol L^-1in hydroxide ion.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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