Question 1

Which of the following is a Lewis base?

Accepted Answer

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

Question 2

What is the pH of a 0.0035 M KOH solution?

Accepted Answer

A)  2.46
B)  5.65
C)  8.35
D)  11.54
E)  None of these choices is correct.F) D) and E)
G) None of the above

Question 3

Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

Accepted Answer

A)  CH3NH2
B)  NaOH
C)  CO2
D)  Ca(OH) 2
E)  CH4F) A) and E)
G) A) and B)

Question 4

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb of 9.1  ×	imes×  10-9.What is the pH of a 0.025 M HONH2 solution?

Accepted Answer

A)  2.90
B)  4.82
C)  9.18
D)  9.91
E)  11.10 F) A) and B)
G) None of the above

Question 5

The substance (CH3CH2) 2NH is considered

Accepted Answer

A)  a weak acid.
B)  a weak base.
C)  a strong acid.
D)  a strong base.
E)  a neutral compound.F) B) and D)
G) C) and E)

Question 6

What is the pH of a 0.0125 M NaOH solution?

Accepted Answer

A)  0.972
B)  1.903
C)  12.097
D)  13.028
E)  None of these choices is correct.F) None of the above
G) C) and D)

Question 7

Lactic acid has a pKa of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Accepted Answer

A)  1.1%
B)  2.2%
C)  4.8%
D)  14%
E)  None of these choices is correct.F) C) and E)
G) C) and D)

Question 8

Which of the following aqueous liquids is the most acidic?

Accepted Answer

A)  0.1 M Al(NO3) 3,Ka = 1  ×	imes×  10-5
B)  0.1 M Be(NO3) 2,Ka = 4  ×	imes×  10-6
C)  0.1 M Pb(NO3) 2,Ka = 3  ×	imes×  10-8
D)  0.1 M Ni(NO3) 2,Ka = 1  ×	imes×  10-10
E)  pure water F) A) and B)
G) A) and C)

Question 9

What is the pH of a 0.050 M LiOH solution?

Accepted Answer

A)  
B)  1.30
C)  3.00
D)  11.00
E)  12.70F) B) and C)
G) C) and D)

Question 10

The acid dissociation constant Ka equals 1.26  ×	imes×  10-2 for HSO4- and is 5.6  ×	imes×  10-10 for NH4+.Which statement about the following equilibrium is correct?
HSO4-(aq) + NH3(aq)  a equals 1.26  	imes  10-2 for HSO4- and is 5.6  	imes  10-10 for NH4+.Which statement about the following equilibrium is correct? HSO4-(aq) + NH3(aq)    SO42-(aq) + NH4+(aq)  A) The reactants will be favored because ammonia is a stronger base than the sulfate anion. B) The products will be favored because the hydrogen sulfate ion is a stronger acid than the ammonium ion. C) Neither reactants or products will be favored because all of the species are weak acids or bases. D) The initial concentrations of the hydrogen sulfate ion and ammonia must be known before any prediction can be made. E) This reaction is impossible to predict,since the strong acid and the weak base appear on the same side of the equation. " class="answers-bank-image d-inline" rel="preload" >
SO42-(aq) + NH4+(aq)

Accepted Answer

A)  The reactants will be favored because ammonia is a stronger base than the sulfate anion.
B)  The products will be favored because the hydrogen sulfate ion is a stronger acid than the ammonium ion.
C)  Neither reactants or products will be favored because all of the species are weak acids or bases.
D)  The initial concentrations of the hydrogen sulfate ion and ammonia must be known before any prediction can be made.
E)  This reaction is impossible to predict,since the strong acid and the weak base appear on the same side of the equation. F) A) and E)
G) C) and E)

Question 11

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35  ×	imes×  10-3 M?

Accepted Answer

A)  4.26  ×	imes×  10-5 M
B)  2.35  ×	imes×  10-11 M
C)  4.26  ×	imes×  10-12 M
D)  2.35  ×	imes×  10-17 M
E)  None of these choices is correct. F) A) and C)
G) B) and D)

Question 12

Which one of the following substances will give an aqueous solution of pH closest to 7?

Accepted Answer

A)  KNO3
B)  CO2
C)  NH4I
D)  NH3
E)  CH3NH2F) B) and C)
G) A) and B)

Question 13

What is the pOH of a 0.0250 M HI solution?

Accepted Answer

A)  0.944
B)  1.602
C)  12.398
D)  13.056
E)  None of these choices is correct.F) B) and E)
G) A) and D)

Question 14

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A)  0.12
B)  0.29
C)  0.63
D)  0.82
E)  > 1.0F) A) and B)
G) A) and C)

Question 15

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate Ka for this acid.

Accepted Answer

K<sub>a</s...

Question 16

Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements 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) All of the above
G) A) and B)

Question 17

It is not possible to have a pH lying outside the range 0 to 14.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)  H2O/OH-
B)  H2O2/HO2-
C)  OH-/O2-
D)  H2PO4-/HPO42-
E)  HCl/H+F) C) and D)
G) B) and C)

Question 19

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

Accepted Answer

An acid is a substance which c...

Question 20

Which of the following aqueous liquids will have 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) None of the above
G) B) and E)

Exam 18: Acid-Base Equilibria

What is the pH of a 0.0035 M KOH solution?

Correct Answer
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Which of the following is a Lewis base?

Correct Answer
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Which one of the following substances will give an aqueous solution of pH closest to 7?

Correct Answer
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What is the pH of a 0.75 M HNO₃ solution?

Correct Answer
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It is not possible to have a pH lying outside the range 0 to 14.

Correct Answer
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Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

Correct Answer
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The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate K_a for this acid.

Correct Answer
verified
K_{aView Answer}

Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b of 9.1 $\times$ 10^-9.What is the pH of a 0.025 M HONH₂ solution?

Correct Answer
verified

Which of the following aqueous liquids will have the highest pH?

Correct Answer
verified

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

Correct Answer
verified
An acid is a substance which c...
View Answer

Which of the following aqueous liquids is the most acidic?

Correct Answer
verified

What is the [OH^-] for a solution at 25°C that has [H₃O⁺] = 2.35 $\times$ 10^-3 M?

Correct Answer
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Ammonium chloride is used as an electrolyte in dry cells.Which of the following statements about a 0.10 M solution of NH₄Cl,is correct?

Correct Answer
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What is the pH of a 0.0125 M NaOH solution?

Correct Answer
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Correct Answer
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Lactic acid has a pK_a of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct Answer
verified

What is the pH of a 0.050 M LiOH solution?

Correct Answer
verified

What is the pOH of a 0.0250 M HI solution?

Correct Answer
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Which one of the following pairs is not a conjugate acid-base pair?

Correct Answer
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The substance (CH₃CH₂) ₂NH is considered

Correct Answer
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Exam 18: Acid-Base Equilibria

What is the pH of a 0.0035 M KOH solution?

Correct AnswerverifiedShow Answer

Which of the following is a Lewis base?

Correct AnswerverifiedShow Answer

Which one of the following substances will give an aqueous solution of pH closest to 7?

Correct AnswerverifiedShow Answer

What is the pH of a 0.75 M HNO3 solution?

Correct AnswerverifiedShow Answer

It is not possible to have a pH lying outside the range 0 to 14.

Correct AnswerverifiedShow Answer

Which one of the following will give a solution with a pH > 7,but is not an Arrhenius base in the strict sense?

Correct AnswerverifiedShow Answer

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate Ka for this acid.

Correct AnswerverifiedKaView AnswerShow Answer

Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb of 9.1 ×\times× 10-9.What is the pH of a 0.025 M HONH2 solution?

Correct AnswerverifiedShow Answer

Which of the following aqueous liquids will have the highest pH?

Correct AnswerverifiedShow Answer

Define an acid according to the Arrhenius theory,and write a balanced equation to support this definition.

Correct AnswerverifiedAn acid is a substance which c...View AnswerShow Answer

Which of the following aqueous liquids is the most acidic?

Correct AnswerverifiedShow Answer

What is the [OH-] for a solution at 25°C that has [H3O+] = 2.35 ×\times× 10-3 M?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the pH of a 0.0125 M NaOH solution?

Correct AnswerverifiedShow Answer

The acid dissociation constant Ka equals 1.26 ×\times× 10-2 for HSO4- and is 5.6 ×\times× 10-10 for NH4+.Which statement about the following equilibrium is correct? HSO4-(aq) + NH3(aq) SO42-(aq) + NH4+(aq)

Correct AnswerverifiedShow Answer

Lactic acid has a pKa of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct AnswerverifiedShow Answer

What is the pH of a 0.050 M LiOH solution?

Correct AnswerverifiedShow Answer

What is the pOH of a 0.0250 M HI solution?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The substance (CH3CH2) 2NH is considered

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
verified

What is the pH of a 0.75 M HNO₃ solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The English are fond of soggy French fries ("chips")wrapped in old newspaper and generously drenched in vinegar,which is a 0.83 M solution of acetic acid.If the acetic acid in vinegar is 0.47% dissociated,calculate K_a for this acid.

Correct Answer
verified
K_{aView Answer}

Hydroxylamine,HONH₂,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has K_b of 9.1 $\times$ 10^-9.What is the pH of a 0.025 M HONH₂ solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
An acid is a substance which c...
View Answer

Correct Answer
verified

What is the [OH^-] for a solution at 25°C that has [H₃O⁺] = 2.35 $\times$ 10^-3 M?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Lactic acid has a pK_a of 3.08.What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The substance (CH₃CH₂) ₂NH is considered

Correct Answer
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