Question 1

Identify the conjugate acid of CO32-

Accepted Answer

A)  H2CO3
B)  HCO3-
C)  H2O
D)  H3O+
E)  CO2F) A) and E)
G) All of the above

Question 2

What is the pH of a 0.014 M Ca(OH) 2 solution?

Accepted Answer

A)  1.85
B)  1.55
C)  12.15
D)  12.45
E)  15.85F) B) and D)
G) A) and B) D

Question 3

The equilibrium constant for the reaction C7H15COOH(aq) + HCOO-(aq)  7H15COOH(aq) + HCOO-(aq)      C7H15COO-(aq) + HCOOH(aq)  Is 7.23 × 10-2 at 25°C.If Ka for formic acid (HCOOH) is 1.77 × 10-4, what is the acid dissociation constant for C7H15COOH? A) 2.45 × 10-3 B) 4.08 × 10-2 C) 7.81 × 10-4 D) 1.00 × 10-4 E) 1.28 × 10-5" class="answers-bank-image d-inline" rel="preload" >  
C7H15COO-(aq) + HCOOH(aq) 
Is 7.23 × 10-2 at 25°C.If Ka for formic acid (HCOOH) is 1.77 × 10-4, what is the acid dissociation constant for C7H15COOH?

Accepted Answer

A)  2.45 × 10-3
B)  4.08 × 10-2
C)  7.81 × 10-4
D)  1.00 × 10-4
E)  1.28 × 10-5F) A) and E)
G) C) and D)

Question 4

The hydronium ion and the hydroxide ion, in that order, are:

Accepted Answer

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

Question 5

Which of these acids is stronger, H2SO4 or HSO4-?

Accepted Answer

Question 6

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.0 × 102 mL of solution.

Accepted Answer

A)  1.35
B)  2.35
C)  7.00
D)  11.65
E)  12.65F) A) and B)
G) A) and C)

Question 7

The pH of a 0.6 M solution of a weak acid is 4.0.What percent of the acid has ionized?

Accepted Answer

The answer of The pH of a 0.6 M solution...

Question 8

Which of the following solutions is acidic?

Accepted Answer

A)  [H3O+] = 7.0 x 10-7 M
B)  [H3O+] = 1.5 x 10-10 M
C)  [H3O+] -7 M
D)  [H3O+] > 7.0 x 10-7 M
E)  [H3O+] = 1.0 x 10-14 MF) A) and D)
G) A) and C)

Question 9

Which of the following is not a conjugate acid-base pair?

Accepted Answer

A)  H3PO4 and H2PO4-
B)  H2PO4- and HPO42-
C)  H3PO4 and HPO42-
D)  HPO42- and PO43-
E)  H2O and H3O+F) C) and D)
G) All of the above

Question 10

Calculate the concentration of oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4) .[For oxalic acid, Ka1 = 6.5 × 10-2, Ka2 = 6.1 × 10-5.]

Accepted Answer

A)  0.11 M
B)  6.1 × 10-5 M
C)  4.0 × 10-6 M
D)  0.0791 M
E)  0.175 MF) A) and E)
G) A) and B)

Question 11

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

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and C)
G) A) and B)

Question 12

Hard water deposits (calcium carbonate) have built up around your bathroom sink.Which one of these substances would be most effective in dissolving the deposits?

Accepted Answer

A)  ammonia
B)  bleach (sodium hypochlorite) 
C)  lye (sodium hydroxide) 
D)  vinegar (acetic acid) E) None of the above
F) B) and C)

Question 13

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

Accepted Answer

1 × 10^-2 M

Question 14

Which of these species will act as a Lewis acid?

Accepted Answer

A)  NH3
B)  NH4+
C)  H2O
D)  BF3
E)  F-F) D) and E)
G) A) and D) D

Question 15

The pOH of a solution is 10.40.Calculate the hydrogen ion concentration in the solution.

Accepted Answer

A)  4.0 × 10-11 M
B)  3.6 M
C)  4.0 × 10-10 M
D)  2.5 × 10-4 M
E)  1.8 × 10-4 MF) A) and B)
G) None of the above

Question 16

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3) = 1.6 × 10-1]

Accepted Answer

A)  1.52
B)  0.80
C)  0.72
D)  0.89
E)  0.66F) D) and E)
G) B) and E)

Question 17

What is the H+ ion concentration in a 4.8 × 10-2 M KOH solution?

Accepted Answer

A)  4.8 × 10-2 M
B)  1.0 × 10-7 M
C)  4.8 × 10-11 M
D)  4.8 × 10-12 M
E)  2.1 × 10-13 MF) B) and D)
G) All of the above

Question 18

Which of the following yields a basic solution when dissolved in water? I.NH3
 II.Na2O
III.LiOH
IV.P4O10

Accepted Answer

A)  I and II
B)  I and IV
C)  II and III
D)  I, II, and III
E)  I, II, III, and IVF) None of the above
G) C) and D)

Question 19

The equilibrium constant for the reaction C6H5COOH(aq) + CH3COO-(aq)  6H5COOH(aq) + CH3COO-(aq)      C6H5COO-(aq) + CH3COOH(aq)  Is 3.6 at 25°C.If Ka for CH3COOH is 1.8 × 10-5, what is the acid dissociation constant for C6H5COOH? A) 5.0 × 10-6 B) 6.5 × 10-5 C) 2.3 × 10-4 D) 8.3 × 10-5 E) 5.6 × 10-6" class="answers-bank-image d-inline" rel="preload" >  
C6H5COO-(aq) + CH3COOH(aq) 
Is 3.6 at 25°C.If Ka for CH3COOH is 1.8 × 10-5, what is the acid dissociation constant for C6H5COOH?

Accepted Answer

A)  5.0 × 10-6
B)  6.5 × 10-5
C)  2.3 × 10-4
D)  8.3 × 10-5
E)  5.6 × 10-6F) C) and D)
G) D) and E)

Question 20

Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 × 10-4 M.

Accepted Answer

A)  2.34
B)  3.47
C)  6.01
D)  7.99
E)  10.53F) A) and B)
G) A) and C)

Exam 15: Acids and Bases

Identify the conjugate acid of CO32-

Correct AnswerverifiedShow Answer

What is the pH of a 0.014 M Ca(OH) 2 solution?

Correct AnswerverifiedD

The equilibrium constant for the reaction C7H15COOH(aq) + HCOO-(aq) C7H15COO-(aq) + HCOOH(aq) Is 7.23 × 10-2 at 25°C.If Ka for formic acid (HCOOH) is 1.77 × 10-4, what is the acid dissociation constant for C7H15COOH?

Correct AnswerverifiedShow Answer

The hydronium ion and the hydroxide ion, in that order, are:

Correct AnswerverifiedShow Answer

Which of these acids is stronger, H2SO4 or HSO4-?

Correct AnswerverifiedShow Answer

Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.0 × 102 mL of solution.

Correct AnswerverifiedShow Answer

The pH of a 0.6 M solution of a weak acid is 4.0.What percent of the acid has ionized?

Correct AnswerverifiedShow Answer

Which of the following solutions is acidic?

Correct AnswerverifiedShow Answer

Which of the following is not a conjugate acid-base pair?

Correct AnswerverifiedShow Answer

Calculate the concentration of oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4) .[For oxalic acid, Ka1 = 6.5 × 10-2, Ka2 = 6.1 × 10-5.]

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hard water deposits (calcium carbonate) have built up around your bathroom sink.Which one of these substances would be most effective in dissolving the deposits?

Correct AnswerverifiedShow Answer

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

Correct Answerverified1 × 10-2 M

Which of these species will act as a Lewis acid?

Correct AnswerverifiedD

The pOH of a solution is 10.40.Calculate the hydrogen ion concentration in the solution.

Correct AnswerverifiedShow Answer

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3) = 1.6 × 10-1]

Correct AnswerverifiedShow Answer

What is the H+ ion concentration in a 4.8 × 10-2 M KOH solution?

Correct AnswerverifiedShow Answer

Which of the following yields a basic solution when dissolved in water? I.NH3 II.Na2O III.LiOH IV.P4O10

Correct AnswerverifiedShow Answer

The equilibrium constant for the reaction C6H5COOH(aq) + CH3COO-(aq) C6H5COO-(aq) + CH3COOH(aq) Is 3.6 at 25°C.If Ka for CH3COOH is 1.8 × 10-5, what is the acid dissociation constant for C6H5COOH?

Correct AnswerverifiedShow Answer

Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 × 10-4 M.

Correct AnswerverifiedShow Answer

Identify the conjugate acid of CO₃^2-

Correct Answer
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What is the pH of a 0.014 M Ca(OH) ₂ solution?

Correct Answer
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D

The equilibrium constant for the reaction C₇H₁₅COOH(aq) + HCOO^-(aq) C₇H₁₅COO^-(aq) + HCOOH(aq) Is 7.23 × 10^-2 at 25°C.If K_a for formic acid (HCOOH) is 1.77 × 10^-4, what is the acid dissociation constant for C₇H₁₅COOH?

Correct Answer
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Correct Answer
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Which of these acids is stronger, H₂SO₄ or HSO₄^-?

Correct Answer
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Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.0 × 10² mL of solution.

Correct Answer
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Calculate the concentration of oxalate ion (C₂O₄^2-) in a 0.175 M solution of oxalic acid (C₂H₂O₄) .[For oxalic acid, K_a1 = 6.5 × 10^-2, K_a2 = 6.1 × 10^-5.]

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

Correct Answer
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1 × 10^-2 M

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D

Correct Answer
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What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO₃? [K_a(HIO₃) = 1.6 × 10^-1]

Correct Answer
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What is the H⁺ ion concentration in a 4.8 × 10^-2 M KOH solution?

Correct Answer
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Which of the following yields a basic solution when dissolved in water? I.NH₃ II.Na₂O III.LiOH IV.P₄O₁₀

Correct Answer
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The equilibrium constant for the reaction C₆H₅COOH(aq) + CH₃COO^-(aq) C₆H₅COO^-(aq) + CH₃COOH(aq) Is 3.6 at 25°C.If K_a for CH₃COOH is 1.8 × 10^-5, what is the acid dissociation constant for C₆H₅COOH?

Correct Answer
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Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 × 10^-4 M.

Correct Answer
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