Question 1

Which is a basic oxide?

Accepted Answer

A)   CO2
B)   MgO
C)   As2O3
D)   SO2
E)   Cl2O7F) None of the above
G) C) and D)

Question 2

List the components in an oxoacid.

Accepted Answer

hydrogen, ...

Question 3

Which represents a weak base B with Kb= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)

Accepted Answer

A)   b= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)  
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C)   b= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)  
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D)   b= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)  
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E)   b= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)  
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G) B) and D)

Question 4

In comparing three solutions with pHs of 2.0, 4.8, and 5.2, which solution is the most acidic?

Accepted Answer

The soluti...

Question 5

What is the conjugate acid of CO32- in the reaction below? CO32- + HSO4- 32- in the reaction below? CO32- + HSO4-   HCO3- + SO42- A)  HCO3- B)  HSO4- C)  OH- D)  H3O+ E)  SO42-" class="answers-bank-image d-inline" rel="preload" > HCO3- + SO42-

Accepted Answer

A)   HCO3-
B)   HSO4-
C)   OH-
D)   H3O+
E)   SO42-F) B) and E)
G) B) and C)

Question 6

Weak acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False  False

Question 7

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Accepted Answer

A)   7.2 × 101
B)   1.6 × 10-1
C)   9.9 × 10-2
D)   1.4 × 10-3
E)   2.7 × 10-4F) A) and B)
G) None of the above

Question 8

What is the conjugate base of water?

Accepted Answer

A)   H3O+
B)   OH-
C)   H3O
D)   OH
E)   H2O2F) All of the above
G) A) and D)

Question 9

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Accepted Answer

A)   2.34 × 10-4 M
B)   2.29 × 10-6 M
C)   4.37 × 10-9 M
D)   4.27 × 10-11 M
E)   8.360 MF) A) and B)
G) A) and E) C

Question 10

In the reaction CaO(s)  + SO2(g)  2(g)    CaSO3(s) , A)  O2- acts as a Lewis base, and SO2 acts as a Lewis acid. B)  Ca2+ acts as a Lewis base, and SO42- acts as a Lewis acid. C)  SO32- acts as a Lewis base, and SO2 acts as a Lewis acid. D)  SO2 acts as a Lewis base, and O2- acts as a Lewis acid. E)  SO2 acts as a Lewis base, and Ca2+ acts as a Lewis acid." class="answers-bank-image d-inline" rel="preload" > CaSO3(s) ,

Accepted Answer

A)   O2- acts as a Lewis base, and SO2 acts as a Lewis acid.
B)   Ca2+ acts as a Lewis base, and SO42- acts as a Lewis acid.
C)   SO32- acts as a Lewis base, and SO2 acts as a Lewis acid.
D)   SO2 acts as a Lewis base, and O2- acts as a Lewis acid.
E)   SO2 acts as a Lewis base, and Ca2+ acts as a Lewis acid.F) C) and D)
G) None of the above

Question 11

Amphoteric oxides are compounds that exhibit both acidic and basic behavior.

Accepted Answer

A) True 
 B)False  True

Question 12

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

Accepted Answer

A)   NaCl
B)   NaNO2
C)   NH4NO3
D)   NH4CN
E)   More than one of the compounds listed will form an acidic solutionF) C) and D)
G) C) and E)

Question 13

A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, 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 concentrations of fluoride ions and sodium ions are equal.
E)   The concentrations of hydronium ions and hydroxide ions are equal.F) C) and D)
G) A) and B)

Question 14

Find the pH of a 0.20 M aqueous solution of dichloroacetic acid, for which Ka = 3.32 × 10-2.

Accepted Answer

A)   0.75
B)   2.71
C)   1.05
D)   2.35
E)   1.18F) A) and B)
G) A) and C)

Question 15

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-)  = 1.5 × 10-10

Accepted Answer

A)   0.38
B)   12.00
C)   10.91
D)   8.09
E)   13.62F) B) and E)
G) A) and D)

Question 16

A 1.25 M solution of the weak acid HA is 9.2% dissociated. What is the pH of the solution?

Accepted Answer

A)   0.64
B)   0.94
C)   1.13
D)   2.16
E)   -0.097F) A) and C)
G) B) and E)

Question 17

Which is the correct statement?

Accepted Answer

A)   A polyprotic acid has more than two ionizable protons.
B)   H2O is a diprotic acid.
C)   All protons are lost from a polyprotic acid at the same time.
D)   NH3 is a diprotic acid.
E)   NH3 is a polyprotic acid.F) A) and E)
G) B) and E)

Question 18

Which is a Lewis base?

Accepted Answer

A)   BCl3
B)   Cu2+
C)   Cl-
D)   Mn2+
E)   NH4+F) A) and D)
G) None of the above

Question 19

For H3PO4, Ka1 = 7.3 × 10-3, Ka2 = 6.2 × 10-6, and Ka3 = 4.8 × 10-13. A 0.10 M aqueous solution of Na3PO4 therefore would be ________.

Accepted Answer

A)   neutral
B)   weakly basic
C)   weakly acidic
D)   strongly acidic
E)   strongly basicF) All of the above
G) A) and E)

Question 20

Which is a basic oxide?

Accepted Answer

A)   CO2
B)   CaO
C)   SO2
D)   H2O
E)   NO2F) A) and E)
G) All of the above

Exam 16: Acids and Bases

Which is a basic oxide?

Correct AnswerverifiedShow Answer

List the components in an oxoacid.

Correct Answerverifiedhydrogen, ...View AnswerShow Answer

Which represents a weak base B with Kb= 2 ×10-3? (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)

Correct AnswerverifiedShow Answer

In comparing three solutions with pHs of 2.0, 4.8, and 5.2, which solution is the most acidic?

Correct AnswerverifiedThe soluti...View AnswerShow Answer

What is the conjugate acid of CO32- in the reaction below? CO32- + HSO4- HCO3- + SO42-

Correct AnswerverifiedShow Answer

Weak acids have weak conjugate bases.

Correct AnswerverifiedFalse

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?

Correct AnswerverifiedShow Answer

What is the conjugate base of water?

Correct AnswerverifiedShow Answer

What is the [H3O+] for a solution at 25°C that has pOH = 5.640?

Correct AnswerverifiedC

In the reaction CaO(s) + SO2(g) CaSO3(s) ,

Correct AnswerverifiedShow Answer

Amphoteric oxides are compounds that exhibit both acidic and basic behavior.

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

A solution is prepared by adding 0.10 mol of sodium fluoride, NaF, to 1.00 L of water. Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

Find the pH of a 0.20 M aqueous solution of dichloroacetic acid, for which Ka = 3.32 × 10-2.

Correct AnswerverifiedShow Answer

What is the pH of a 0.0100 M sodium benzoate solution? Kb (C7H5O2-) = 1.5 × 10-10

Correct AnswerverifiedShow Answer

A 1.25 M solution of the weak acid HA is 9.2% dissociated. What is the pH of the solution?

Correct AnswerverifiedShow Answer

Which is the correct statement?

Correct AnswerverifiedShow Answer

Which is a Lewis base?

Correct AnswerverifiedShow Answer

For H3PO4, Ka1 = 7.3 × 10-3, Ka2 = 6.2 × 10-6, and Ka3 = 4.8 × 10-13. A 0.10 M aqueous solution of Na3PO4 therefore would be ________.

Correct AnswerverifiedShow Answer

Which is a basic oxide?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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hydrogen, ...
View Answer

Which represents a weak base B with K_b= 2 ×10^-3? (Each circle represents 1.0 ×10^-3 mol of atoms, and the volume of each box is 1.0 L. Solvent water molecules are not shown for clarity.)

Correct Answer
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Correct Answer
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The soluti...
View Answer

What is the conjugate acid of CO₃^2- in the reaction below? CO₃^2- + HSO₄^- HCO₃^- + SO₄^2-

Correct Answer
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Correct Answer
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False

A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of K_a for this acid?

Correct Answer
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Correct Answer
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What is the [H₃O⁺] for a solution at 25°C that has pOH = 5.640?

Correct Answer
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C

In the reaction CaO(s) + SO₂(g) CaSO₃(s) ,

Correct Answer
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Correct Answer
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True

Correct Answer
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Correct Answer
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Find the pH of a 0.20 M aqueous solution of dichloroacetic acid, for which K_a = 3.32 × 10^-2.

Correct Answer
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What is the pH of a 0.0100 M sodium benzoate solution? K_b (C₇H₅O₂^-) = 1.5 × 10^-10

Correct Answer
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Correct Answer
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For H₃PO₄, K_a1 = 7.3 × 10^-3, K_a2 = 6.2 × 10^-6, and K_a3 = 4.8 × 10^-13. A 0.10 M aqueous solution of Na₃PO₄ therefore would be ________.

Correct Answer
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Correct Answer
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