Question 1

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) A) and B)
G) A) and C)

Question 2

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

Question 3

Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the Ka for the acid?

Accepted Answer

A)  0.36
B)  2.4 × 10-2
C)  7.8 × 10-3
D)  1.5 × 10-5
E)  1.9 × 10-3F) A) and B)
G) B) and D)

Question 4

Acid strength increases in the series HCN 4-.Which of these species is the strongest base?

Accepted Answer

A)  H2SO4
B)  SO42-
C)  F-
D)  CN -
E)  HSO4-F) None of the above
G) A) and B)

Question 5

RCOOH is an organic compound which is in the ______________ family.

Accepted Answer

The answer of RCOOH is an organic compound which is...

Question 6

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

Question 7

What is the conjugate acid of the hydroxide ion?

Accepted Answer

A)  H3O+
B)  OH-
C)  H3O
D)  OH
E)  H2OF) C) and E)
G) B) and C)

Question 8

A hydrohalic acid is a binary acid containing a halogen.

Accepted Answer

A) True 
 B)False

Question 9

If a strong acid such as HCl is diluted sufficiently with water,the pH will be higher than 7.

Accepted Answer

A) True 
 B)False

Question 10

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

Question 11

The reaction of a strong acid with water results in

Accepted Answer

A)  a weak conjugate acid.
B)  a strong conjugate base.
C)  a weak conjugate base.
D)  a strong base.
E)  pure water.F) B) and D)
G) B) and E)

Question 12

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

Question 13

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

Question 14

What is the conjugate acid of HS-?

Accepted Answer

A)  HS2
B)  S2-
C)  HS
D)  H2S
E)  SOHF) A) and C)
G) C) and E)

Question 15

Which one of these salts will form a basic solution upon dissolving in water?

Accepted Answer

A)  NaCl
B)  NaNO2
C)  NH4NO3
D)  KBr
E)  AlCl3F) A) and C)
G) B) and C)

Question 16

What is the conjugate base of sulfuric acid?

Accepted Answer

A)  HSO4-
B)  H3O+
C)  OH-
D)  SO42-
E)  H3SO4+F) C) and D)
G) B) and D)

Question 17

A solution is prepared by adding 0.10 mol of potassium chloride,KCl,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 solution is a strong oxidant.
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.F) A) and C)
G) A) and E)

Question 18

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 mmol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.)  a" class="answers-bank-image d-inline" rel="preload" > What is the percent ionization of HA?

Accepted Answer

A)  100%
B)  50%
C)  25%
D)  12.5%
E)  Cannot be calculated without knowledge of KaF) A) and D)
G) A) and C)

Question 19

Which is the weakest acid?

Accepted Answer

A)  HBrO4
B)  HBr
C)  HBrO2
D)  HBrO
E)  HBrO3F) None of the above
G) A) and B)

Question 20

What is the concentration of OH- in a 0.083 M NaOH solution?

Accepted Answer

A)  0.083 M
B)  1.21 × 10-13 M
C)  8.30 × 10-16 M
D)  7 M
E)  8.30 × 1012 MF) All of the above
G) A) and B)

Exam 16: Acids and Bases

Which is the strongest base?

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

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What is the conjugate base of sulfuric acid?

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

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What is the conjugate acid of HS-?

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Acid strength increases in the series HCN < HF < HSO4-.Which of these species is the strongest base?

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If a strong acid such as HCl is diluted sufficiently with water,the pH will be higher than 7.

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What is the conjugate acid of the hydroxide ion?

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Which is the correct statement?

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Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the Ka for the acid?

Correct AnswerverifiedShow Answer

A hydrohalic acid is a binary acid containing a halogen.

Correct AnswerverifiedShow Answer

A solution is prepared by adding 0.10 mol of potassium chloride,KCl,to 1.00 L of water.Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

The reaction of a strong acid with water results in

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Which one of these salts will form a basic solution upon dissolving in water?

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Which is the weakest acid?

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

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

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

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What is the concentration of OH- in a 0.083 M NaOH solution?

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RCOOH is an organic compound which is in the ______________ family.

Correct AnswerverifiedShow Answer

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

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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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Acid strength increases in the series HCN < HF < HSO₄^-.Which of these species is the strongest base?

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Butyric acid is responsible for the odor in rancid butter.A solution of 0.25 M butyric acid has a pH of 2.71.What is the K_a for the acid?

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

Correct Answer
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What is the concentration of OH^- in a 0.083 M NaOH solution?

Correct Answer
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Correct Answer
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