Question 1

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

Question 2

Since arsenic is a nonmetal,As2O3 is expected to be a/an _____ oxide.

Accepted Answer

A)  acidic
B)  ionic
C)  amphoteric
D)  neutral
E)  basicF) B) and E)
G) A) and B)

Question 3

Formic acid,which is a component of some insect venoms,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) A) and E)
G) C) and D)

Question 4

Which is the strongest acid?

Accepted Answer

A)  SO42-
B)  H2SO3
C)  H2SO4
D)  HSO4-
E)  HSO3-F) B) and C)
G) All of the above

Question 5

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

Accepted Answer

A)  Ca2+
B)  O2-
C)  CO2
D)  CaCO3
E)  CO32-F) D) and E)
G) C) and D)

Question 6

What is the name given to a substance that can act as a Brønsted acid or as a Brønsted base according to what it is reacting with?

Accepted Answer

A)  hydrophilic
B)  hydrophobic
C)  amphoteric
D)  isoprotic
E)  isoelectronicF) C) and D)
G) B) and E)

Question 7

What mass of sodium nitrite must be added to enough water to make 350.0 mL of a solution with pH = 8.40? [Ka(HNO2) = 5.6 × 10-4]

Accepted Answer

A)  68 g
B)  1.7 × 10-4 g
C)  0.039 g
D)  8.7 g
E)  24 gF) A) and C)
G) All of the above

Question 8

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

Question 9

Which is the strongest acid?

Accepted Answer

A)  HBrO3
B)  HClO
C)  HBrO2
D)  HBrO
E)  HClO3F) C) and D)
G) D) and E)

Question 10

What is the pOH of a 0.0085 M KOH solution?

Accepted Answer

A)  2.07
B)  4.85
C)  9.15
D)  11.93
E)  0.0085F) A) and D)
G) A) and E)

Question 11

Which is the formula for the hydronium ion?

Accepted Answer

A)  OH-
B)  H2O
C)  H3O+
D)  H3O-
E)  H2O +F) B) and D)
G) C) and D)

Question 12

Find the pH of a 0.135 M aqueous solution of periodic acid (HIO4) ,for which Ka = 2.3 × 10-2.

Accepted Answer

A)  1.25
B)  3.28
C)  1.17
D)  1.34
E)  1.64F) B) and D)
G) A) and C)

Question 13

In the reaction,HSO4-(aq) + OH-(aq)  4-(aq) + OH-(aq)    SO42-(aq) + H2O (l) ,the conjugate acid-base pairs are pair 1 pair 2 A) HSO4- and SO42-; H2O and OH-. B) HSO4- and H3O+; SO42 - and OH-. C) HSO4- and OH-; SO42 - and H2O. D) HSO4- and H2O; OH - and SO42-. E) HSO4- and OH-; SO42 - and H3O+." class="answers-bank-image d-inline" rel="preload" > SO42-(aq) + H2O (l) ,the conjugate acid-base pairs are pair 1 pair 2

Accepted Answer

A)  HSO4- and SO42-; H2O and OH-.
B)  HSO4- and H3O+; SO42 - and OH-.
C)  HSO4- and OH-; SO42 - and H2O.
D)  HSO4- and H2O; OH - and SO42-.
E)  HSO4- and OH-; SO42 - and H3O+.F) B) and D)
G) A) and E)

Question 14

What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10-5]

Accepted Answer

A)  3.74
B)  4.98
C)  6.53
D)  9.02
E)  11.28F) A) and E)
G) B) and D)

Question 15

Which statement is true regarding the reversible reaction below? H2CO3+ F- 2CO3+ F-   HCO3+ HF.Ka1(H2CO3) = 4.2 × 10-7; Ka(HF) = 7.1 × 10-4 A) At equilibrium,[HF] > [H2CO3] because HF is a stronger acid than H2CO3. B) At equilibrium,[HF] > [H2CO3] because H2CO3 is a stronger acid than HF. C) At equilibrium,[HF] = [H2CO3]. D) At equilibrium,[H2CO3] > [HF] because HF is a stronger acid than H2CO3. E) At equilibrium,[H2CO3] > [HF] because H2CO3 is a stronger acid than HF." class="answers-bank-image d-inline" rel="preload" > HCO3+ HF.Ka1(H2CO3) = 4.2 × 10-7; Ka(HF) = 7.1 × 10-4

Accepted Answer

A)  At equilibrium,[HF] > [H2CO3] because HF is a stronger acid than H2CO3.
B)  At equilibrium,[HF] > [H2CO3] because H2CO3 is a stronger acid than HF.
C)  At equilibrium,[HF] = [H2CO3].
D)  At equilibrium,[H2CO3] > [HF] because HF is a stronger acid than H2CO3.
E)  At equilibrium,[H2CO3] > [HF] because H2CO3 is a stronger acid than HF.F) C) and D)
G) B) and E)

Question 16

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

Accepted Answer

A)  ICl4-
B)  ICl3
C)  Cl-
D)  I3+
E)  The solventF) A) and C)
G) C) and D)

Question 17

The stronger the acid,the weaker its conjugate base.

Accepted Answer

A) True 
 B)False

Question 18

A(n)_______________ can be added to a solution to increase the pH of the solution.

Accepted Answer

The answer of A(n)_______________ can be added to a solution...

Question 19

Which of the following salts will form an acidic solution when dissolved in water?

Accepted Answer

A)  NaCl
B)  NaNO2
C)  NH4NO3
D)  NH4CNE) All of the above
F) B) and C)

Question 20

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42-
  42- in the reaction HCO3- + HPO42-     H2CO3 + PO43- A) H2O B) HCO3- C) H2CO3 D) PO43- E) None of these" class="answers-bank-image d-inline" rel="preload" > H2CO3 + PO43-

Accepted Answer

A)  H2O
B)  HCO3-
C)  H2CO3
D)  PO43-
E)  None of theseF) C) and E)
G) A) and B)

Exam 16: Acids and Bases

Since arsenic is a nonmetal,As2O3 is expected to be a/an _____ oxide.

Correct AnswerverifiedShow Answer

In the reaction,HSO4-(aq) + OH-(aq) SO42-(aq) + H2O (l) ,the conjugate acid-base pairs are pair 1 pair 2

Correct AnswerverifiedShow Answer

What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10-5]

Correct AnswerverifiedShow Answer

The stronger the acid,the weaker its conjugate base.

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Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- H2CO3 + PO43-

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is the strongest acid?

Correct AnswerverifiedShow Answer

What is the name given to a substance that can act as a Brønsted acid or as a Brønsted base according to what it is reacting with?

Correct AnswerverifiedShow Answer

Which is the formula for the hydronium ion?

Correct AnswerverifiedShow Answer

Which of the following salts will form an acidic solution when dissolved in water?

Correct AnswerverifiedShow Answer

Formic acid,which is a component of some insect venoms,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 pOH of a 0.0085 M KOH solution?

Correct AnswerverifiedShow Answer

Which is the strongest acid?

Correct AnswerverifiedShow Answer

A(n)_______________ can be added to a solution to increase the pH of the solution.

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

What mass of sodium nitrite must be added to enough water to make 350.0 mL of a solution with pH = 8.40? [Ka(HNO2) = 5.6 × 10-4]

Correct AnswerverifiedShow Answer

Find the pH of a 0.135 M aqueous solution of periodic acid (HIO4) ,for which Ka = 2.3 × 10-2.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement is true regarding the reversible reaction below? H2CO3+ F- HCO3+ HF.Ka1(H2CO3) = 4.2 × 10-7; Ka(HF) = 7.1 × 10-4

Correct AnswerverifiedShow Answer

Since arsenic is a nonmetal,As₂O₃ is expected to be a/an _____ oxide.

Correct Answer
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In the reaction,HSO₄^-(aq) + OH^-(aq) SO₄^2-(aq) + H₂O (l) ,the conjugate acid-base pairs are pair 1 pair 2

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What is the pH of a 0.20 M solution of NH₄Cl? [K_b(NH₃) = 1.8 × 10^-⁵]

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Identify the conjugate base of HPO₄^2- in the reaction HCO₃^- + HPO₄^2- H₂CO₃ + PO₄^3-

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

Correct Answer
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Formic acid,which is a component of some insect venoms,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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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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What mass of sodium nitrite must be added to enough water to make 350.0 mL of a solution with pH = 8.40? [K_a(HNO₂) = 5.6 × 10^-⁴]

Correct Answer
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Find the pH of a 0.135 M aqueous solution of periodic acid (HIO₄) ,for which K_a = 2.3 × 10^-².

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

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

Correct Answer
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Which statement is true regarding the reversible reaction below? H₂CO₃+ F^- HCO₃+ HF.K_a1(H₂CO₃) = 4.2 × 10^-⁷; K_a(HF) = 7.1 × 10^-⁴

Correct Answer
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