Question 1

Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L.)  -3 mol of atoms, and the volume of the box is 1.0 L.)    What is the autoionization constant for HX? A)  4.9 ×10-2 B)  4.0 ×10-3 C)  4.4 ×10-4 D)  4.0 ×10-6 E)  2.5 ×105" class="answers-bank-image d-inline" rel="preload" > What is the autoionization constant for HX?

Accepted Answer

A)   4.9 ×10-2
B)   4.0 ×10-3
C)   4.4 ×10-4
D)   4.0 ×10-6
E)   2.5 ×105F) A) and D)
G) B) and E)

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) A) and E)
G) C) and D)

Question 3

The following is the correct order for the acid strength for these oxoacids. HClO > HClO2 > HClO3 > HClO4

Accepted Answer

A) True 
 B)False

Question 4

What is the conjugate acid of NH3?

Accepted Answer

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

Question 5

Which aqueous solution has the highest pH?

Accepted Answer

A)   0.1 M CH3COOH, pKa = 4.7
B)   0.1 M CuCl2, pKa = 7.5
C)   0.1 M H3C6H5O7, pKa = 3.1
D)   0.1 M ZnCl2, pKa = 9.0
E)   pure waterF) B) and D)
G) C) and E)

Question 6

HCN is classified as a weak acid in water. What does this classification mean?

Accepted Answer

A relatively small f...

Question 7

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...

Question 8

The most basic oxides are formed from elements found in the ________ region of the periodic table.

Accepted Answer

A)   upper right
B)   upper left
C)   center
D)   lower right
E)   lower leftF) All of the above
G) C) and E)

Question 9

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) None of the above

Question 10

Which diagram best represents the products when equimolar amounts of HF(g)  and NH3(g)  react?

Accepted Answer

A)   3(g)  react? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   3(g)  react? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   3(g)  react? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   3(g)  react? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   3(g)  react? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) C) and E)
G) All of the above

Question 11

Acid strength decreases in the series HI > HSO4-> HF > HCN. Which of these anions is the weakest base?

Accepted Answer

A)   I-
B)   SO42-
C)   F-
D)   CN-E) A) and B)
F) A) and C)

Question 12

Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.)  -3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.)    What is the pH of the solution? A)  2.4 B)  3.0 C)  2.1 D)  11.0 E)  11.6" class="answers-bank-image d-inline" rel="preload" > What is the pH of the solution?

Accepted Answer

A)   2.4
B)   3.0
C)   2.1
D)   11.0
E)   11.6F) A) and D)
G) A) and E)

Question 13

Which of the following species can act as a Lewis acid?

Accepted Answer

A)   NH3
B)   F-
C)   H2O
D)   NH4+
E)   BF3F) B) and C)
G) A) and B)

Question 14

A hydrohalic acid is a binary acid containing a halogen.

Accepted Answer

A) True 
 B)False

Question 15

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH) 2 solution?

Accepted Answer

A)   0.50 × 10-3 M
B)   1.0 × 10-3 M
C)   2.0 × 10-3 M
D)   1.0 × 10-2 M
E)   3.3 × 10-4 MF) C) and D)
G) B) and D)

Question 16

Which is an acidic oxide?

Accepted Answer

A)   P4O10
B)   MgO
C)   Fe2O3
D)   K2O
E)   Cr2O3F) A) and B)
G) B) and C)

Question 17

Which is the formula for the hydronium ion?

Accepted Answer

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

Question 18

Amphoteric oxides exhibit both acidic and basic properties.

Accepted Answer

A) True 
 B)False

Question 19

All strong acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False

Question 20

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4, Ka2 = 5.6 × 10-8, and Ka3 = 3 × 10-13. What is the pH of a 0.500 M solution of arsenic acid?

Accepted Answer

A)   0.85
B)   1.95
C)   3.90
D)   4.51
E)   None of these choices is correct.F) B) and E)
G) A) and B)

Exam 16: Acids and Bases

The most basic oxides are formed from elements found in the ________ region of the periodic table.

Correct AnswerverifiedShow Answer

Which of the following species can act as a Lewis acid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH) 2 solution?

Correct AnswerverifiedShow Answer

The following is the correct order for the acid strength for these oxoacids. HClO > HClO2 > HClO3 > HClO4

Correct AnswerverifiedShow Answer

Which diagram best represents the products when equimolar amounts of HF(g) and NH3(g) react?

Correct AnswerverifiedShow Answer

Which is an acidic oxide?

Correct AnswerverifiedShow Answer

Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L.) What is the autoionization constant for HX?

Correct AnswerverifiedShow Answer

Which is the formula for the hydronium ion?

Correct AnswerverifiedShow Answer

Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Correct AnswerverifiedShow Answer

All strong acids have weak conjugate bases.

Correct AnswerverifiedShow Answer

Which aqueous solution has the highest pH?

Correct AnswerverifiedShow Answer

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4, Ka2 = 5.6 × 10-8, and Ka3 = 3 × 10-13. What is the pH of a 0.500 M solution of arsenic acid?

Correct AnswerverifiedShow Answer

HCN is classified as a weak acid in water. What does this classification mean?

Correct AnswerverifiedA relatively small f...View AnswerShow Answer

What is the conjugate acid of NH3?

Correct AnswerverifiedShow Answer

Acid strength decreases in the series HI > HSO4-> HF > HCN. Which of these anions is the weakest base?

Correct AnswerverifiedShow Answer

A hydrohalic acid is a binary acid containing a halogen.

Correct AnswerverifiedShow Answer

Amphoteric oxides exhibit both acidic and basic properties.

Correct AnswerverifiedShow Answer

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

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

Correct Answer
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Correct Answer
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Correct Answer
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What is the concentration of OH^- in a 1.0 × 10^-3^MBa(OH) ₂ solution?

Correct Answer
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The following is the correct order for the acid strength for these oxoacids. HClO > HClO₂ > HClO₃ > HClO₄

Correct Answer
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Which diagram best represents the products when equimolar amounts of HF(g) and NH₃(g) react?

Correct Answer
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Correct Answer
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Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10^-3 mol of atoms, and the volume of the box is 1.0 L.) What is the autoionization constant for HX?

Correct Answer
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Correct Answer
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Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10^-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Correct Answer
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Correct Answer
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Correct Answer
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Farmers who raise cotton once used arsenic acid, H₃AsO₄, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K_a1 = 2.5 × 10^-4, K_a2 = 5.6 × 10^-8, and K_a3 = 3 × 10^-13. What is the pH of a 0.500 M solution of arsenic acid?

Correct Answer
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Correct Answer
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A relatively small f...
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What is the conjugate acid of NH₃?

Correct Answer
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Acid strength decreases in the series HI > HSO₄^-> HF > HCN. Which of these anions is the weakest base?

Correct Answer
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Correct Answer
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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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Correct Answer
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