Question 1

Which one of the following salts,when dissolved in water,produces the solution with the highest pH?

Accepted Answer

A)  RbI
B)  RbBr
C)  RbCl
D)  RbFE) All of the above
F) B) and D)

Question 2

At 25 °C,the pH of pure water is:

Accepted Answer

A)  0
B)  >0,
C)  7
D)  >7,
E)  14F) A) and D)
G) C) and D)

Question 3

Which indication of relative acid strengths is INCORRECT?

Accepted Answer

A)  HCl > HF
B)  HClO2 > HClO
C)  H2SO4 > H2SO3 
D)  H2SO3 > HNO3 
E)  CH3CO2H > CH3CH2OHF) B) and D)
G) D) and E)

Question 4

For HI,predict whether the solution is acidic,basic or neutral and why.

Accepted Answer

A)  acidic because HI is a strong acid
B)  basic because HI is a weak base
C)  neutral because there is no hydrolysis
D)  basic because HI is the salt of a weak acid
E)  acidic because HI is the salt of a weak baseF) A) and E)
G) B) and E)

Question 5

For NaC2H3O2,predict whether the aqueous solution is acidic,basic or neutral and why.

Accepted Answer

A)  acidic because NaC2H3O2 is a strong acid
B)  basic because NaC2H3O2 is a weak base
C)  neutral because there is no hydrolysis
D)  basic because NaC2H3O2 is the salt of a weak acid
E)  acidic because NaC2H3O2 is the salt of a weak baseF) A) and D)
G) A) and B)

Question 6

What is the [Cl-] of a solution prepared by dissolving 0.1824 g of hydrogen chloride in sufficient pure water to prepare 500.0 ml of solution?

Accepted Answer

A)  1.00 × 10-2 M
B)  1.00 × 10-8 M
C)  1.00 × 10-12 M
D)  1.00 × 10-4 M
E)  1.0 MF) B) and D)
G) C) and E)

Question 7

H2SO4 is a weaker acid than H2SO3.

Accepted Answer

A) True 
 B)False

Question 8

Calculate the pH of a 0.800 mol L-1 aqueous NaCH3CO2 solution.Ka for acetic acid,CH3CO2H,is -1 aqueous NaCH3CO2 solution.Ka for acetic acid,CH3CO2H,is   A) 2.42 B) 4.68 C) 9.32 D) 11.58" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2.42
B)  4.68
C)  9.32
D)  11.58E) None of the above
F) All of the above

Question 9

pOH = 3.14 is equivalent to:

Accepted Answer

A)  pH = 11
B)  [H+] = 1.4 × 10-10 M
C)  [OH-] = 7.2 × 10-4 M
D)  [H+} = 7.0 × 10-4 M
E)  [OH-] = 3.14 × 10-7 MF) A) and B)
G) A) and C)

Question 10

Choose the Br∅nsted-Lowry acids and bases in the following equation:
H2O + NH2- ⇌ NH3 + OH-

Accepted Answer

A)  acids H2O,OH- bases NH3,NH2- 
B)  acids NH2-,NH3 bases H2O,OH- 
C)  acids H2O,NH2- bases OH-,NH3 
D)  acids NH3,NH2- bases OH-,H2O
E)  acids H2O,NH3 bases NH2-,OH- F) B) and D)
G) C) and D)

Question 11

Calculate the pH of a 1.60 mol L-1 CH3NH3Cl solution.Kb for methylamine,CH3NH2,is -1 CH3NH3Cl solution.Kb for methylamine,CH3NH2,is   A) 1.61 B) 5.18 C) 8.82 D) 12.39" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1.61
B)  5.18
C)  8.82
D)  12.39E) A) and B)
F) A) and C)

Question 12

According to the Arrhenius theory,a neutralization reaction involves the combination of an acid with a base to make only water.

Accepted Answer

A) True 
 B)False

Question 13

What is the pH of a 0.375 M aqueous solution of benzoic acid? 
Ka = 6.3 × 10-5

Accepted Answer

A)  8.9
B)  5.1
C)  2.3
D)  0.43
E)  11.7F) A) and B)
G) B) and E)

Question 14

When dissolved in water,which compound is generally considered to be an Arrhenius acid?

Accepted Answer

A)  CH3CO2H
B)  NaOH
C)  Na2CO3
D)  CH3CH2OHE) All of the above
F) A) and B)

Question 15

The term pH = -ln [H+].

Accepted Answer

A) True 
 B)False

Question 16

Determine the pH of 263 ml of an aqueous solution which has [NH4I] = 0.300 M.Kb = 1.74 × 10-5 for NH3(aq) .

Accepted Answer

A)  2.6
B)  11.4
C)  4.9
D)  9.1
E)  4.6F) C) and E)
G) All of the above

Question 17

Which of the following is a logical inference from the fact that a 0.10 M solution of potassium acetate,KC2H3O2,is less alkaline than a 0.10 M solution of potassium cyanide,KCN?

Accepted Answer

A)  Hydrocyanic acid is a weaker acid than acetic acid.
B)  Cyanides are less soluble than acetates.
C)  Hydrocyanic acid is less soluble in water than acetic acid.
D)  Acetic acid is a weaker acid than hydrocyanic acid.
E)  0.10 M potassium acetate is more concentrated than 0.10 M potassium cyanide.F) B) and C)
G) A) and B)

Question 18

A solution has pOH of -0.47.This means that:

Accepted Answer

A)  the solution has a pH of 13.53
B)  the solution has an [OH-] = 0.34 M
C)  the solution has an [OH-] greater than 10.0 M
D)  the solution has an [OH-] = 2.95 M
E)  The solution has an [H+] = 2.95 MF) A) and B)
G) A) and C)

Question 19

Which species in the following reaction acts as a Lewis acid?
CuSO4(s) + 4 NH3(aq) ⇌ [Cu(NH3) 4]2+(aq) + SO42-(aq)

Accepted Answer

A)  SO42- 
B)  Cu2+ 
C)  [Cu(NH3) 4]2+(aq) 
D)  NH3 
E)  [Cu(NH3) 4]2+(aq) and SO42-F) B) and E)
G) C) and E)

Question 20

The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0 °C is 4.9 × -1 sodium cyanide (NaCN) ? A) 11.11 B) 2.89 C) 1.3 × 10-3 D) 7.8 × 10-12 E) 3.9 × 10-11" class="answers-bank-image d-inline" rel="preload" >
.What is the pH of an aqueous solution of 0.080 mol L-1 sodium cyanide (NaCN) ?

Accepted Answer

A)  11.11
B)  2.89
C)  1.3 × 10-3
D)  7.8 × 10-12
E)  3.9 × 10-11F) A) and D)
G) All of the above

Exam 16: Acids and Bases

For NaC2H3O2,predict whether the aqueous solution is acidic,basic or neutral and why.

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Which one of the following salts,when dissolved in water,produces the solution with the highest pH?

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At 25 °C,the pH of pure water is:

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Which species in the following reaction acts as a Lewis acid? CuSO4(s) + 4 NH3(aq) ⇌ [Cu(NH3) 4]2+(aq) + SO42-(aq)

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What is the pH of a 0.375 M aqueous solution of benzoic acid? Ka = 6.3 × 10-5

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pOH = 3.14 is equivalent to:

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Determine the pH of 263 ml of an aqueous solution which has [NH4I] = 0.300 M.Kb = 1.74 × 10-5 for NH3(aq) .

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Choose the Br∅nsted-Lowry acids and bases in the following equation: H2O + NH2- ⇌ NH3 + OH-

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What is the [Cl-] of a solution prepared by dissolving 0.1824 g of hydrogen chloride in sufficient pure water to prepare 500.0 ml of solution?

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Which of the following is a logical inference from the fact that a 0.10 M solution of potassium acetate,KC2H3O2,is less alkaline than a 0.10 M solution of potassium cyanide,KCN?

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Calculate the pH of a 1.60 mol L-1 CH3NH3Cl solution.Kb for methylamine,CH3NH2,is

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H2SO4 is a weaker acid than H2SO3.

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The term pH = -ln [H+].

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When dissolved in water,which compound is generally considered to be an Arrhenius acid?

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For HI,predict whether the solution is acidic,basic or neutral and why.

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A solution has pOH of -0.47.This means that:

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Which indication of relative acid strengths is INCORRECT?

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According to the Arrhenius theory,a neutralization reaction involves the combination of an acid with a base to make only water.

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The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0 °C is 4.9 × .What is the pH of an aqueous solution of 0.080 mol L-1 sodium cyanide (NaCN) ?

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Calculate the pH of a 0.800 mol L-1 aqueous NaCH3CO2 solution.Ka for acetic acid,CH3CO2H,is

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For NaC₂H₃O₂,predict whether the aqueous solution is acidic,basic or neutral and why.

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Which species in the following reaction acts as a Lewis acid? CuSO₄(s) + 4 NH₃(aq) ⇌ [Cu(NH₃) _4]²⁺(aq) + SO₄^2-(aq)

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What is the pH of a 0.375 M aqueous solution of benzoic acid? K_a = 6.3 × 10^-5

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Determine the pH of 263 ml of an aqueous solution which has [NH₄I] = 0.300 M.K_b = 1.74 × 10^-5 for NH₃(aq) .

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Choose the Br∅nsted-Lowry acids and bases in the following equation: H₂O + NH₂^- ⇌ NH₃ + OH^-

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What is the [Cl^-] of a solution prepared by dissolving 0.1824 g of hydrogen chloride in sufficient pure water to prepare 500.0 ml of solution?

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Which of the following is a logical inference from the fact that a 0.10 M solution of potassium acetate,KC₂H₃O₂,is less alkaline than a 0.10 M solution of potassium cyanide,KCN?

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Calculate the pH of a 1.60 mol L^-1 CH₃NH₃Cl solution.K_b for methylamine,CH₃NH₂,is

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H₂SO₄ is a weaker acid than H₂SO₃.

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The term pH = -ln [H⁺].

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The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0 °C is 4.9 × .What is the pH of an aqueous solution of 0.080 mol L^-1 sodium cyanide (NaCN) ?

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Calculate the pH of a 0.800 mol L^-1 aqueous NaCH₃CO₂ solution.K_a for acetic acid,CH₃CO₂H,is

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