Question 1

Which is the strongest acid?

Accepted Answer

A)   HBrO4
B)   HBr
C)   HBrO2
D)   HBrO
E)   HBrO3F) A) and B)
G) A) and C)

Question 2

What is the pOH of a 0.025 M HI solution?

Accepted Answer

A)   0.025
B)   0.94
C)   1.60
D)   12.40
E)   10.31F) B) and C)
G) C) and D)

Question 3

Hard water deposits (calcium carbonate)  have built up around your bathroom sink. Which 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) A) and D)
F) B) and C)

Question 4

What is the conjugate acid of the hydroxide ion?

Accepted Answer

A)   H3O+
B)   OH-
C)   H3O
D)   OH
E)   H2OF) A) and D)
G) None of the above

Question 5

The first ionization constant Ka1 is always smaller than the second ionization constant Ka2 for the ionization of a diprotic acid.

Accepted Answer

A) True 
 B)False

Question 6

What is the pH of a 0.050 M triethylamine, (C2H5) 3N, solution? Kb for triethylamine is 5.3 × 10-4.

Accepted Answer

A)   11.69
B)   8.68
C)   5.32
D)   2.31
E)   1.30F) B) and E)
G) A) and D)

Question 7

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

Question 8

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr) , for which Ka = 2.06 × 10-9.

Accepted Answer

A)   4.712
B)   8.686
C)   0.738
D)   4.576
E)   9.288F) B) and E)
G) C) and E)

Question 9

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

Question 10

What is the concentration of H+ in a 0.025 M HCl solution?

Accepted Answer

A)   0
B)   0.013 M
C)   0.025 M
D)   0.050 M
E)   0.010 MF) B) and D)
G) A) and C)

Question 11

Since zirconium is a metal, ZrO2 is expected to be a/an ________ oxide.

Accepted Answer

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

Question 12

Calculate the concentration of malonate ion (C3H2O42-)  in a 0.200 M solution of malonic acid (C3H4O4) . (For malonic acid, Ka1 = 1.4 × 10-3, Ka2 = 2.0 × 10-6.)

Accepted Answer

A)   2.8 × 10-4 M
B)   0.016 M
C)   1.8 × 10-4 M
D)   1.4 × 10-3 M
E)   2.0 × 10-6 MF) All of the above
G) A) and E)

Question 13

Which is the strongest base?

Accepted Answer

A)   CH3NH2, Kb = 4.4 × 10-4
B)   C5H5N, Kb = 1.7 × 10-9
C)   H2NCONH2, Kb = 1.5 × 10-14
D)   NH3, Kb = 1.8 × 10-5
E)   C2H5NH2, Kb = 5.6 × 10-4F) None of the above
G) A) and D)

Question 14

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH4Cl is correct?

Accepted Answer

A)   The solution is weakly basic.
B)   The solution is strongly basic.
C)   The solution is neutral.
D)   The solution is acidic.
E)   The values for Ka and Kb for the species in solution must be known before a prediction can be made.F) C) and D)
G) B) and C)

Question 15

The ammonium ion, NH4+, is a weak acid.

Accepted Answer

A) True 
 B)False

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 B)
G) B) and E)

Question 17

Which is the strongest acid?

Accepted Answer

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

Question 18

What is the value of the equilibrium constant for the autoionization of water at 25°C?

Accepted Answer

A)   1.0 × 10-7
B)   1.0 × 10-14
C)   1.0 × 1014
D)   1.0 × 107
E)   14F) A) and C)
G) B) and E)

Question 19

What is the name of a proton donor in an acid-base reaction?

Accepted Answer

A)   Arrhenius acid
B)   Arrhenius base
C)   Brønsted acid
D)   Brønsted base
E)   Lewis baseF) B) and C)
G) All of the above

Question 20

Which is a basic oxide?

Accepted Answer

A)   NO2
B)   H2O
C)   Na2O
D)   SnO
E)   SO2F) C) and E)
G) B) and D)

Exam 16: Acids and Bases

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH4Cl is correct?

Correct AnswerverifiedShow Answer

Calculate the concentration of malonate ion (C3H2O42-) in a 0.200 M solution of malonic acid (C3H4O4) . (For malonic acid, Ka1 = 1.4 × 10-3, Ka2 = 2.0 × 10-6.)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is the strongest base?

Correct AnswerverifiedShow Answer

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr) , for which Ka = 2.06 × 10-9.

Correct AnswerverifiedShow Answer

What is the conjugate acid of the hydroxide ion?

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

What is the value of the equilibrium constant for the autoionization of water at 25°C?

Correct AnswerverifiedShow Answer

What is the pOH of a 0.025 M HI solution?

Correct AnswerverifiedShow Answer

Since zirconium is a metal, ZrO2 is expected to be a/an ________ oxide.

Correct AnswerverifiedShow Answer

Which is a basic oxide?

Correct AnswerverifiedShow Answer

Which is the strongest acid?

Correct AnswerverifiedShow Answer

Which is the strongest acid?

Correct AnswerverifiedShow Answer

The first ionization constant Ka1 is always smaller than the second ionization constant Ka2 for the ionization of a diprotic acid.

Correct AnswerverifiedShow Answer

What is the concentration of H+ in a 0.025 M HCl solution?

Correct AnswerverifiedShow Answer

The ammonium ion, NH4+, is a weak acid.

Correct AnswerverifiedShow Answer

What is the name of a proton donor in an acid-base reaction?

Correct AnswerverifiedShow Answer

What is the pH of a 0.050 M triethylamine, (C2H5) 3N, solution? Kb for triethylamine is 5.3 × 10-4.

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

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

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH₄Cl is correct?

Correct Answer
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Calculate the concentration of malonate ion (C₃H₂O₄^2-) in a 0.200 M solution of malonic acid (C₃H₄O₄) . (For malonic acid, K_a1 = 1.4 × 10^-3, K_a2 = 2.0 × 10^-6.)

Correct Answer
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Correct Answer
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Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr) , for which K_a = 2.06 × 10^-9.

Correct Answer
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Correct Answer
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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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Correct Answer
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Correct Answer
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Since zirconium is a metal, ZrO₂ is expected to be a/an ________ oxide.

Correct Answer
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Correct Answer
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Correct Answer
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The first ionization constant K_a1 is always smaller than the second ionization constant K_a2 for the ionization of a diprotic acid.

Correct Answer
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What is the concentration of H⁺ in a 0.025 M HCl solution?

Correct Answer
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The ammonium ion, NH₄⁺, is a weak acid.

Correct Answer
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Correct Answer
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What is the pH of a 0.050 M triethylamine, (C₂H₅) ₃N, solution? K_b for triethylamine is 5.3 × 10^-4.

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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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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