Question 1

The conjugate base of NH3 is ________.

Accepted Answer

A)  NH2-
B)  NH4+
C)  NH2OH
D)  H3O+
E)  OH-F) A) and C)
G) None of the above

Question 2

The  of hypochlorous acid (HClO) is 3.0 ×  at 25.0 °C.Calculate the pH of a  hypochlorous acid solution.

Accepted Answer

A)  3.05
B)  9.53
C)  4.47
D)  6.52
E)  -3.05F) B) and D)
G) D) and E)

Question 3

Ka for arsenic acic,HAsO42-,is 7.5 × 10-12.What is the pH of a 0.15 M aqueous solution of AsO43-?

Accepted Answer

A)  7.97
B)  12.10
C)  8.04
D)  1.96
E)  6.00F) D) and E)
G) A) and C)

Question 4

An aqueous solution contains 0.390 M HCl at 25.0 °C.The pH of the solution is ________.

Accepted Answer

A)  0.41
B)  0.390
C)  13.61
D)  13.59
E)  7.00F) B) and D)
G) A) and B)

Question 5

Using the data in the table,which of the conjugate bases below is the weakest base? - B) CHO2- C) ClO- D) F- E) OAc- and CHO2-" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  OAc-
B)  CHO2-
C)  ClO-
D)  F-
E)  OAc- and CHO2-F) A) and E)
G) A) and D)

Question 6

Of the following,which is the strongest acid?

Accepted Answer

A)  HClO
B)  HClO3
C)  HClO2
D)  HClO4
E)  HIOF) A) and E)
G) A) and B)

Question 7

An aqueous basic solution has a concentration of 0.050 M and Kb is 4.4 × 10-4.What is the concentration of hydronium ion in this solution (M) ?

Accepted Answer

A)  2.2 × 10-13
B)  2.2 × 10-12
C)  2.9 × 10-13
D)  0.050
E)  4.5 × 10-13F) D) and E)
G) None of the above

Question 8

Using the data in the table,which of the conjugate bases below is the weakest base? - B) CHO2- C) ClO- D) F- E) OAc- and CHO2-" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  OAc-
B)  CHO2-
C)  ClO-
D)  F-
E)  OAc- and CHO2-F) B) and D)
G) C) and D)

Question 9

What is the pOH of a 0.030 M solution of calcium hydroxide?

Accepted Answer

A)  12.78
B)  1.22
C)  12.48
D)  10.41
E)  1.52F) A) and D)
G) A) and C)

Question 10

The hydride ion, 3O+ (aq)  B) OH- (aq) + H2 (g)  C) OH- (aq) + 2H+ (aq)  D) no reaction occurs E) H2O2 (aq) " class="answers-bank-image d-inline" rel="preload" > ,is a stronger base than the hydroxide ion,O 3O+ (aq)  B) OH- (aq) + H2 (g)  C) OH- (aq) + 2H+ (aq)  D) no reaction occurs E) H2O2 (aq) " class="answers-bank-image d-inline" rel="preload" > .The product(s) of the reaction of hydride ion with water is/are ________.

Accepted Answer

A)  H3O+ (aq) 
B)  OH- (aq) + H2 (g) 
C)  OH- (aq) + 2H+ (aq) 
D)  no reaction occurs
E)  H2O2 (aq) F) None of the above
G) C) and E)

Question 11

Hydrochloric acid is a strong acid.This means that ________.

Accepted Answer

A)  HCl dissociates completely to H+(aq) and Cl-(aq) when it dissolves in water
B)  HCl does not dissociate at all when it is dissolved in water
C)  HCl produces a gaseous product when it is neutralized
D)  HCl cannot be neutralized by a weak base
E)  aqueous solutions of HCl contain equal concentrations of H+(aq) and OH-(aq) F) B) and E)
G) B) and D)

Question 12

The  for acid HA is  What is the pH of a 0.15 M aqueous solution of KA?

Accepted Answer

A)  0.82
B)  8.17
C)  5.83
D)  1.17
E)  5.01F) D) and E)
G) C) and D)

Question 13

The acid-dissociation constants of sulfurous acid (H2SO3) are Ka1 = 1.7 × 10-2 and 2SO3) are Ka1 = 1.7 × 10-2 and   at 25.0 °C.Calculate the pH of a 0.163 M aqueous solution of sulfurous acid. A) 4.53 B) 1.28 C) 1.86 D) 6.21 E) 1.93" class="answers-bank-image d-inline" rel="preload" > at 25.0 °C.Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

Accepted Answer

A)  4.53
B)  1.28
C)  1.86
D)  6.21
E)  1.93F) D) and E)
G) None of the above

Question 14

Which one of the following is the weakest acid?

Accepted Answer

A)  HF (Ka = 6.8 × 10-4) 
B)  HClO (Ka = 3.0 × 10-8) 
C)  HNO2 (Ka = 4.5 × 10-4) 
D)  HCN (Ka = 4.9 × 10-10) 
E)  Acetic acid (Ka = 1.8 × 10-5) F) C) and E)
G) B) and E)

Question 15

Ammonia is a ________.

Accepted Answer

A)  weak acid
B)  strong base
C)  weak base
D)  strong acid
E)  saltF) A) and E)
G) A) and C)

Question 16

The pH of an aqueous solution at 25.0 °C is 10.55.What is the molarity of -11 B) 3.5 × 10-4 C) 3.45 D) 1.1 × 10-13 E) 3.5 × 1010" class="answers-bank-image d-inline" rel="preload" > in this solution?

Accepted Answer

A)  2.8 × 10-11
B)  3.5 × 10-4
C)  3.45
D)  1.1 × 10-13
E)  3.5 × 1010F) C) and D)
G) C) and E)

Question 17

Of the following,which is the weakest acid?

Accepted Answer

A)  HPO3-
B)  H3PO4
C)  H2PO4-
D)  HPO4-
E)  The acid strength of all of the above is the same.F) None of the above
G) A) and D)

Question 18

The  of citric acid is 1.9 ×  at 25.0 °C.What is the pH of a 0.35 M aqueous solution of citric acid?

Accepted Answer

A)  0.46
B)  2.59
C)  5.23
D)  -3.46
E)  2.13F) B) and E)
G) B) and D)

Question 19

Which of the following 0.5 M aqueous salt solutions will have a pH of 7.0 at 4 NH4Cl A) LiF only B) NaClO4 only C) LiF and RbBr D) RbBr and NaClO4 E) NH4Cl only" class="answers-bank-image d-inline" rel="preload" > LiF RbBr NaClO4 NH4Cl

Accepted Answer

A)  LiF only
B)  NaClO4 only
C)  LiF and RbBr
D)  RbBr and NaClO4
E)  NH4Cl onlyF) B) and C)
G) A) and E)

Question 20

The Ka for HCN is 4.9 × 10-10.What is the value of Kb for CN-?

Accepted Answer

A)  2.0 × 10-5
B)  4.0 × 10-6
C)  4.9 × 104
D)  4.9 × 10-24
E)  2.0 × 109F) None of the above
G) A) and B)

Exam 16: Acid-Base Equilibria

An aqueous basic solution has a concentration of 0.050 M and Kb is 4.4 × 10-4.What is the concentration of hydronium ion in this solution (M) ?

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Ammonia is a ________.

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The of hypochlorous acid (HClO) is 3.0 × at 25.0 °C.Calculate the pH of a hypochlorous acid solution.

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Of the following,which is the strongest acid?

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Which of the following 0.5 M aqueous salt solutions will have a pH of 7.0 at LiF RbBr NaClO4 NH4Cl

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The pH of an aqueous solution at 25.0 °C is 10.55.What is the molarity of in this solution?

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Of the following,which is the weakest acid?

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The Ka for HCN is 4.9 × 10-10.What is the value of Kb for CN-?

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Using the data in the table,which of the conjugate bases below is the weakest base?

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The hydride ion, ,is a stronger base than the hydroxide ion,O .The product(s) of the reaction of hydride ion with water is/are ________.

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The acid-dissociation constants of sulfurous acid (H2SO3) are Ka1 = 1.7 × 10-2 and at 25.0 °C.Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

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The for acid HA is What is the pH of a 0.15 M aqueous solution of KA?

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What is the pOH of a 0.030 M solution of calcium hydroxide?

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Which one of the following is the weakest acid?

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Using the data in the table,which of the conjugate bases below is the weakest base?

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The conjugate base of NH3 is ________.

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The of citric acid is 1.9 × at 25.0 °C.What is the pH of a 0.35 M aqueous solution of citric acid?

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Hydrochloric acid is a strong acid.This means that ________.

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An aqueous solution contains 0.390 M HCl at 25.0 °C.The pH of the solution is ________.

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Ka for arsenic acic,HAsO42-,is 7.5 × 10-12.What is the pH of a 0.15 M aqueous solution of AsO43-?

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An aqueous basic solution has a concentration of 0.050 M and K_b is 4.4 × 10^-4.What is the concentration of hydronium ion in this solution (M) ?

Correct Answer
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Which of the following 0.5 M aqueous salt solutions will have a pH of 7.0 at LiF RbBr NaClO₄ NH₄Cl

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The K_a for HCN is 4.9 × 10^-10.What is the value of K_b for CN^-?

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The acid-dissociation constants of sulfurous acid (H₂SO₃) are K_a1= 1.7 × 10^-2 and at 25.0 °C.Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

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The conjugate base of NH₃ is ________.

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K_a for arsenic acic,HAsO₄^2-,is 7.5 × 10^-12.What is the pH of a 0.15 M aqueous solution of AsO₄^3-?

Correct Answer
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