Question 1

In a triprotic acid,which Ka has the highest value?

Accepted Answer

A)  Ka1 
B)  Ka2 
C)  Ka3 
D)  Kb1 
E)  Kb2 
A)  Ka1 
B)  Ka2 
C)  Ka3 
D)  Kb1 
E)  Kb2

Question 2

Which of the following is a weak base?

Accepted Answer

A)  NH(CH3)2 
B)  N2 
C)  NaOH 
D)  CH2CH2 
E)  None of the above are weak bases. 
A)  NH(CH3)2 
B)  N2 
C)  NaOH 
D)  CH2CH2 
E)  None of the above are weak bases.

Question 3

Give the characteristics of a strong acid.

Accepted Answer

A)  ionizes completely in aqueous solutions 
B)  has equilibrium far to the right 
C)  has a polar bond 
D)  has a weaker bond to hydrogen 
E)  all of the above 
A)  ionizes completely in aqueous solutions 
B)  has equilibrium far to the right 
C)  has a polar bond 
D)  has a weaker bond to hydrogen 
E)  all of the above

Question 4

What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with   The equation for the dissociation of hypochlorous acid is:

Accepted Answer

A)  1.9 × 10-4 M 
B)  7.2 × 10-4 M 
C)  2.8 × 10-5 M 
D)  7.2 × 10-5 M 
A)  1.9 × 10-4 M 
B)  7.2 × 10-4 M 
C)  2.8 × 10-5 M 
D)  7.2 × 10-5 M

Question 5

Which of the following bases is the weakest? The base is followed by its Kb value.

Accepted Answer

A)  HOCH2CH2NH2, 3.2 × 10-5 
B)  NH3, 1.76 × 10-5 
C)  C5H5N, 1.7 × 10-9 
D)  (CH3CH2)3N, 5.2 × 10-4 
E)  Since these are all weak bases, they have the same strength. 
A)  HOCH2CH2NH2, 3.2 × 10-5 
B)  NH3, 1.76 × 10-5 
C)  C5H5N, 1.7 × 10-9 
D)  (CH3CH2)3N, 5.2 × 10-4 
E)  Since these are all weak bases, they have the same strength.

Question 6

Which of the following solutions would have the lowest pH? Assume that they are all 0.10 M in acid at 25∘C.The acid is followed by its Ka value.

Accepted Answer

A)  HF, 3.5 × 10-4 
B)  HCN, 4.9 × 10-10 
C)  HNO2, 4.6 × 10-4 
D)  HCHO2, 1.8 × 10-4 
E)  HClO2, 1.1 × 10-2 
A)  HF, 3.5 × 10-4 
B)  HCN, 4.9 × 10-10 
C)  HNO2, 4.6 × 10-4 
D)  HCHO2, 1.8 × 10-4 
E)  HClO2, 1.1 × 10-2

Question 7

Determine the pH of a 0.461 M C6H5CO2H M solution if the Ka of C6H5CO2H is 6.5 × 10-5.

Accepted Answer

A)  2.26 
B)  4.52 
C)  11.74 
D)  9.48 
E)  5.48 
A)  2.26 
B)  4.52 
C)  11.74 
D)  9.48 
E)  5.48

Question 8

What is the autoionization of water?

Accepted Answer

Autoionization of water is the equilibri

Question 9

What is the difference between a strong and weak acid?

Accepted Answer

A strong acid ionizes/dissocia

Question 10

________ is the active component in vinegar.

Accepted Answer

A)  CH3COOH 
B)  H2CO3 
C)  HCOOH 
D)  H3C6H5O7 
E)  CH3CH2COOH 
A)  CH3COOH 
B)  H2CO3 
C)  HCOOH 
D)  H3C6H5O7 
E)  CH3CH2COOH

Question 11

Identify the weakest acid.

Accepted Answer

A)  HF 
B)  HCl 
C)  HBr 
D)  HI 
E)  Not enough information is available. 
A)  HF 
B)  HCl 
C)  HBr 
D)  HI 
E)  Not enough information is available.

Question 12

Calculate the pH of a 0.200 M NaCN solution.The Ka for HCN is 4.9 × 10-10.

Accepted Answer

A)  3.87 
B)  11.31 
C)  2.69 
D)  10.13 
A)  3.87 
B)  11.31 
C)  2.69 
D)  10.13

Question 13

Identify the strongest acid.

Accepted Answer

A)  H2O 
B)  H2S 
C)  H2Se 
D)  H2Te 
E)  Not enough information is available. 
A)  H2O 
B)  H2S 
C)  H2Se 
D)  H2Te 
E)  Not enough information is available.

Question 14

Determine the [H3O⁺] in a 0.265 M HClO solution.The Ka of HClO is 2.9 × 10-8.

Accepted Answer

A)  1.1 × 10-10 M 
B)  7.7 × 10-9 M 
C)  1.3 × 10-6 M 
D)  4.9 × 10-4 M 
E)  8.8 × 10-5 M 
A)  1.1 × 10-10 M 
B)  7.7 × 10-9 M 
C)  1.3 × 10-6 M 
D)  4.9 × 10-4 M 
E)  8.8 × 10-5 M

Question 15

Determine the pH of a 0.580 M KCH3CO2 solution at 25°C.The Ka of CH3CO2H is 1.80 × 10-5.

Accepted Answer

A)  9.25 
B)  4.75 
C)  7.00 
D)  12.5 
E)  1.47 
A)  9.25 
B)  4.75 
C)  7.00 
D)  12.5 
E)  1.47

Question 16

A solution with a hydroxide ion concentration of 4.15 × 10-6 M is ________ and has a hydrogen ion concentration of ________.

Accepted Answer

A)  acidic, 2.41 × 10-8 M 
B)  acidic, 2.41 × 10-9 M 
C)  basic, 2.41 × 10-8 M 
D)  basic, 2.41 × 10-9 M 
A)  acidic, 2.41 × 10-8 M 
B)  acidic, 2.41 × 10-9 M 
C)  basic, 2.41 × 10-8 M 
D)  basic, 2.41 × 10-9 M

Question 17

Determine the pOH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

Accepted Answer

A)  4.59 
B)  9.41 
C)  4.71 
D)  10.14 
E)  9.29 
A)  4.59 
B)  9.41 
C)  4.71 
D)  10.14 
E)  9.29

Question 18

If an equal number of moles of the weak acid HF  and the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Accepted Answer

A)  acidic 
B)  basic 
C)  neutral 
D)  There is insufficient information provided to answer this question. 
A)  acidic 
B)  basic 
C)  neutral 
D)  There is insufficient information provided to answer this question.

Question 19

Which of the following is an Arrhenius acid?

Accepted Answer

A)  H2SO4 
B)  NaOH 
C)  NH2CH3 
D)  CH3CH3 
E)  More than one of these is an Arrhenius acid. 
A)  H2SO4 
B)  NaOH 
C)  NH2CH3 
D)  CH3CH3 
E)  More than one of these is an Arrhenius acid.

Question 20

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

Accepted Answer

A)  NaI 
B)  NaBr 
C)  NaCl 
D)  NaF 
A)  NaI 
B)  NaBr 
C)  NaCl 
D)  NaF

Exam 17: Acids and Bases

In a triprotic acid,which Ka has the highest value?

Which of the following is a weak base?

Give the characteristics of a strong acid.

What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with The equation for the dissociation of hypochlorous acid is:

Which of the following bases is the weakest? The base is followed by its Kb value.

Which of the following solutions would have the lowest pH? Assume that they are all 0.10 M in acid at 25∘C.The acid is followed by its Ka value.

Determine the pH of a 0.461 M C6H5CO2H M solution if the Ka of C6H5CO2H is 6.5 × 10-5.

What is the autoionization of water?

What is the difference between a strong and weak acid?

________ is the active component in vinegar.

Identify the weakest acid.

Calculate the pH of a 0.200 M NaCN solution.The Ka for HCN is 4.9 × 10-10.

Identify the strongest acid.

Determine the [H3O⁺] in a 0.265 M HClO solution.The Ka of HClO is 2.9 × 10-8.

Determine the pH of a 0.580 M KCH3CO2 solution at 25°C.The Ka of CH3CO2H is 1.80 × 10-5.

A solution with a hydroxide ion concentration of 4.15 × 10-6 M is ________ and has a hydrogen ion concentration of ________.

Determine the pOH of a 0.227 M C5H5N solution at 25°C.The Kb of C5H5N is 1.7 × 10-9.

If an equal number of moles of the weak acid HF and the strong base KOH are added to water,is the resulting solution acidic,basic,or neutral?

Which of the following is an Arrhenius acid?

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

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

In a triprotic acid,which K_a has the highest value?

Which of the following bases is the weakest? The base is followed by its K_b value.

Which of the following solutions would have the lowest pH? Assume that they are all 0.10 M in acid at 25^∘C.The acid is followed by its K_a value.

Determine the pH of a 0.461 M C₆H₅CO₂H M solution if the K_a of C₆H₅CO₂H is 6.5 × 10^-5.

Calculate the pH of a 0.200 M NaCN solution.The K_a for HCN is 4.9 × 10^-10.

Determine the [H₃O⁺] in a 0.265 M HClO solution.The K_a of HClO is 2.9 × 10^-8.

Determine the pH of a 0.580 M KCH₃CO₂ solution at 25°C.The K_a of CH₃CO₂H is 1.80 × 10^-5.

A solution with a hydroxide ion concentration of 4.15 × 10^-⁶ M is and has a hydrogen ion concentration of .

Determine the pOH of a 0.227 M C₅H₅N solution at 25°C.The K_b of C₅H₅N is 1.7 × 10^-9.