Question 1

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

Accepted Answer

A)   KNO3
B)   CO2
C)   NH4I
D)   NH3
E)   CH3NH2F) B) and E)
G) A) and E)

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 B)
G) A) and C)

Question 3

Which one of the following is a strong acid?

Accepted Answer

A)   H2CO3
B)   H2SO3
C)   H2SO4
D)   H3PO4
E)   CH3COOHF) C) and D)
G) C) and E)

Question 4

A solution is prepared by adding 0.10 mol of iron(III)  nitrate, Fe(NO3) 3, 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 value of Ka for the species in solution must be known before a prediction can be made.
E)   The value of Kb for the species in solution must be known before a prediction can be made.F) A) and D)
G) D) and E)

Question 5

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) A) and D)

Question 6

Select the pair of substances that is not a conjugate acid-base pair.

Accepted Answer

A)   H3O+, H2O
B)   HNO2, NO2-
C)   H2SO4, HSO4-
D)   H2S, S2-
E)   NH3, NH2-F) A) and B)
G) A) and C)

Question 7

All Lewis acids contain at least one proton.

Accepted Answer

A) True 
 B)False

Question 8

What is the value of Ka for the methylammonium ion, CH3NH3+? Kb(CH3NH2)  = 4.4 × 10-4

Accepted Answer

A)   4.4 × 10-4
B)   4.8 × 10-6
C)   4.4 × 10-10 
D)   2.3 × 10-11
E)   4.4 × 10-18F) B) and C)
G) B) and D)

Question 9

Which of the following acids has the lowest pH? 0.1 M HBO, pKa = 2.43
0) 1 M HA, pKa = 4.55
0) 1 M HMO, pKa = 8.23
0) 1 M HST, pKa = 11.89
Pure water

Accepted Answer

A)   HA
B)   HST
C)   HMO
D)   HBO
E)   pure waterF) A) and E)
G) A) and D)

Question 10

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

Question 11

The substance HClO4 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 B)
G) A) and E)

Question 12

According to Brønsted and Lowry, which one of the following is not a conjugate acid-base pair?

Accepted Answer

A)   H3O+/OH-
B)   CH3OH2+/CH3OH
C)   HI/I-
D)   HSO4-/SO42-
E)   H2/H-F) C) and E)
G) A) and B)

Question 13

In order to be a Brønsted-Lowry base, a species must contain a proton.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A)   ICl4- 
B)   ICl3
C)   Cl-
D)   the solvent
E)   None of these choices are correct.F) C) and D)
G) A) and B)

Question 15

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) C) and D)
G) B) and E)

Question 16

A student adds 0.1 mol of oxalic acid and 0.1 mol of sodium dihydrogen phosphate to enough water to make 1.0 L of solution. The following equilibrium is established with the concentrations of the products greater than the concentrations of the reactants. Which of the statements about the equilibrium system is correct? H2C2O4(aq)  + H2PO4(aq)  2C2O4(aq)  + H2PO4(aq)    HC2O4(aq)  + H3PO4(aq)  A)  Oxalic acid is a weaker acid than phosphoric acid. B)  The hydrogen oxalate anion, HC2O4, is a stronger base than the dihydrogen phosphate anion, H2PO4. C)  Phosphoric acid is a weaker acid than oxalic acid. D)  The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid. E)  Water is a stronger acid than either oxalic or phosphoric acids." class="answers-bank-image d-inline" rel="preload" > HC2O4(aq)  + H3PO4(aq)

Accepted Answer

A)   Oxalic acid is a weaker acid than phosphoric acid.
B)   The hydrogen oxalate anion, HC2O4, is a stronger base than the dihydrogen phosphate anion, H2PO4.
C)   Phosphoric acid is a weaker acid than oxalic acid.
D)   The dihydrogen phosphate anion, H2PO4-, is a stronger acid than oxalic acid.
E)   Water is a stronger acid than either oxalic or phosphoric acids.F) D) and E)
G) C) and E)

Question 17

Select the strongest acid from the following list.

Accepted Answer

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

Question 18

The substance HOBr 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 E)
G) A) and B)

Question 19

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) None of the above
G) B) and D)

Question 20

The hydrated Al3+ ion, Al(H2O) 63+, is a weak acid in water. What are the products of its reaction with H2O? Al(H2O) 63+(aq)  + H2O(l)  → ?

Accepted Answer

A)   Al(H2O) 5OH2+(aq)  + H3O+(aq) 
B)   Al(H2O) 6H4+(aq)  + OH-(aq) 
C)   Al(H2O) 53+(aq)  + 2H2O(l) 
D)   Al(H2O) 6OH2+(aq)  + H3O+(aq) 
E)   Al(H2O) 62+(aq)  + H3O+(aq) F) A) and B)
G) C) and D)

Exam 18: Acid-Base Equilibria

In order to be a Brønsted-Lowry base, a species must contain a proton.

Correct Answer
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Select the pair of substances that is not a conjugate acid-base pair.

Correct Answer
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Which one of the following substances will give an aqueous solution of pH closest to 7?

Correct Answer
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The substance HClO₄ is considered

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

Correct Answer
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All Lewis acids contain at least one proton.

Correct Answer
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What is the value of K_a for the methylammonium ion, CH₃NH₃⁺? K_b(CH₃NH₂) = 4.4 × 10^-4

Correct Answer
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Correct Answer
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Which of the following acids has the lowest pH? 0.1 M HBO, pK_a = 2.43 0) 1 M HA, pK_a = 4.55 0) 1 M HMO, pK_a = 8.23 0) 1 M HST, pK_a = 11.89 Pure water

Correct Answer
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The hydrated Al³⁺ ion, Al(H₂O) ₆³⁺, is a weak acid in water. What are the products of its reaction with H₂O? Al(H₂O) ₆³⁺(aq) + H₂O(l) → ?

Correct Answer
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A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO₃) ₃, to 1.00 L of water. Which statement about the solution is correct?

Correct Answer
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The substance HCl is considered

Correct Answer
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According to Brønsted and Lowry, which one of the following is not a conjugate acid-base pair?

Correct Answer
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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 this reaction?

Correct Answer
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The substance H₂SO₃ is considered

Correct Answer
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The substance HOBr is considered

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

Correct Answer
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Select the strongest acid from the following list.

Correct Answer
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Which one of the following is a strong acid?

Correct Answer
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An aqueous solution is considered to be acidic if

Correct Answer
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Exam 18: Acid-Base Equilibria

In order to be a Brønsted-Lowry base, a species must contain a proton.

Correct AnswerverifiedShow Answer

Select the pair of substances that is not a conjugate acid-base pair.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The substance HClO4 is considered

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

All Lewis acids contain at least one proton.

Correct AnswerverifiedShow Answer

What is the value of Ka for the methylammonium ion, CH3NH3+? Kb(CH3NH2) = 4.4 × 10-4

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following acids has the lowest pH? 0.1 M HBO, pKa = 2.43 0) 1 M HA, pKa = 4.55 0) 1 M HMO, pKa = 8.23 0) 1 M HST, pKa = 11.89 Pure water

Correct AnswerverifiedShow Answer

The hydrated Al3+ ion, Al(H2O) 63+, is a weak acid in water. What are the products of its reaction with H2O? Al(H2O) 63+(aq) + H2O(l) → ?

Correct AnswerverifiedShow Answer

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO3) 3, to 1.00 L of water. Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

The substance HCl is considered

Correct AnswerverifiedShow Answer

According to Brønsted and Lowry, which one of the following is not a conjugate acid-base pair?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The substance H2SO3 is considered

Correct AnswerverifiedShow Answer

The substance HOBr is considered

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Select the strongest acid from the following list.

Correct AnswerverifiedShow Answer

Which one of the following is a strong acid?

Correct AnswerverifiedShow Answer

An aqueous solution is considered to be acidic if

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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The substance HClO₄ is considered

Correct Answer
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Correct Answer
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Correct Answer
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What is the value of K_a for the methylammonium ion, CH₃NH₃⁺? K_b(CH₃NH₂) = 4.4 × 10^-4

Correct Answer
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Correct Answer
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Which of the following acids has the lowest pH? 0.1 M HBO, pK_a = 2.43 0) 1 M HA, pK_a = 4.55 0) 1 M HMO, pK_a = 8.23 0) 1 M HST, pK_a = 11.89 Pure water

Correct Answer
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The hydrated Al³⁺ ion, Al(H₂O) ₆³⁺, is a weak acid in water. What are the products of its reaction with H₂O? Al(H₂O) ₆³⁺(aq) + H₂O(l) → ?

Correct Answer
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A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO₃) ₃, to 1.00 L of water. Which statement about the solution is correct?

Correct Answer
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Correct Answer
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Correct Answer
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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 this reaction?

Correct Answer
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The substance H₂SO₃ is considered

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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Correct Answer
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