Question 1

What is the strongest acid of the following?

Accepted Answer

A) HOI 
B) HOBr 
C) HOCl 
D) All are equivalent. 
A) HOI 
B) HOBr 
C) HOCl 
D) All are equivalent.

Question 2

What is the strongest acid among the following?

Accepted Answer

A) H2O 
B) H2S 
C) H2Se 
D) H2Te 
A) H2O 
B) H2S 
C) H2Se 
D) H2Te

Question 3

What is the hydronium ion concentration of an acid rain sample that has a pH of 3.15?

Accepted Answer

A) 1.41 × 10-11 M 
B) 7.08 × 10-4 M 
C) 3.15 M 
D) 10.85 M 
A) 1.41 × 10-11 M 
B) 7.08 × 10-4 M 
C) 3.15 M 
D) 10.85 M

Question 4

Calculate the concentration of bicarbonate ion,HCO3-,in a 0.050 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Accepted Answer

A) 1.5 × 10-4 M 
B) 4.3 × 10-7 M 
C) 2.2 × 10-8 M 
D) 5.6 × 10-11 M 
A) 1.5 × 10-4 M 
B) 4.3 × 10-7 M 
C) 2.2 × 10-8 M 
D) 5.6 × 10-11 M

Question 5

What is the hydronium ion concentration and the pH for an aqueous solution of NH3 that has a hydroxide ion concentration of

Accepted Answer

A) 4.44 × 10-10 M and 4.65 
B) 4.44 × 10-10 M and 9.35 
C) 4.44 × 10-11 M and 3.65 
D) 4.44 × 10-11 M and 10.35 
A) 4.44 × 10-10 M and 4.65 
B) 4.44 × 10-10 M and 9.35 
C) 4.44 × 10-11 M and 3.65 
D) 4.44 × 10-11 M and 10.35

Question 6

What is the pH of a 0.020 M HClO4 solution?

Accepted Answer

A) 0.020 
B) 0.040 
C) 1.70 
D) 12.30 
A) 0.020 
B) 0.040 
C) 1.70 
D) 12.30

Question 7

What is the strongest acid among the following?

Accepted Answer

A) HIO 
B) HIO2 
C) HIO3 
D) HIO4 
A) HIO 
B) HIO2 
C) HIO3 
D) HIO4

Question 8

Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10-4 M in hydroxide ion.

Accepted Answer

A) 4.00 × 10-9 M 
B) 4.00 × 10-10 M 
C) 4.00 × 10-11 M 
D) 5.00 × 10-11 M 
A) 4.00 × 10-9 M 
B) 4.00 × 10-10 M 
C) 4.00 × 10-11 M 
D) 5.00 × 10-11 M

Question 9

Which Br∅nsted-Lowry acid has the strongest conjugate base?

Accepted Answer

A) CH4 
B) HClO4 
C) HF  
D) Hl 
A) CH4 
B) HClO4 
C) HF  
D) Hl

Question 10

What is the conjugate acid of the Br∅nsted-Lowry base HAsO42-?

Accepted Answer

A) H2AsO4- 
B) AsO43- 
C) H2O 
D) H3O+ 
A) H2AsO4- 
B) AsO43- 
C) H2O 
D) H3O+

Question 11

What is the pH of a 0.20 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10-4 and Ka2 = 1.0 × 10-11?

Accepted Answer

A) 2.29 
B) 3.89 
C) 4.59 
D) 5.57 
A) 2.29 
B) 3.89 
C) 4.59 
D) 5.57

Question 12

In the following reaction the unshaded spheres represent H atoms.  
-Identify the Br∅nsted-Lowry acid/base conjugate pairs.

Accepted Answer

A) (1)/(2)and (3)/(4) 
B) (1)/(3)and (2)/(4) 
C) (1)/(4)and (2)/(3) 
A) (1)/(2)and (3)/(4) 
B) (1)/(3)and (2)/(4) 
C) (1)/(4)and (2)/(3)

Question 13

The equilibrium constant for the reaction below has the value Ka = 3.5 × 10-4.In this reaction the stronger Br∅nsted-Lowry acid is ________ and the weaker Br∅nsted-Lowry acid is ________.
HF(aq)+ H2O(l)⇌ H3O+(aq)+ F-(aq)

Accepted Answer

Question 14

Normal rainfall has a concentration of OH- that is 3.99 × 10-9.The concentration of H3O+ in normal rainfall is

Accepted Answer

A) greater than 3.99 × 10-9,and the rain is acidic. 
B) greater than 3.99 × 10-9,and the rain is basic. 
C) less than 3.99 × 10-9,and the rain is acidic. 
D) less than 3.99 × 10-9,and the rain is basic. 
A) greater than 3.99 × 10-9,and the rain is acidic. 
B) greater than 3.99 × 10-9,and the rain is basic. 
C) less than 3.99 × 10-9,and the rain is acidic. 
D) less than 3.99 × 10-9,and the rain is basic.

Question 15

A solution with a hydroxide ion concentration of 4.15 × 10-4 M is ________ and has a hydrogen ion concentration of ________.

Accepted Answer

A) acidic,2.41 × 10-10 M 
B) acidic,2.41 × 10-11 M 
C) basic,2.41 × 10-10 M 
D) basic,2.41 × 10-11 M 
A) acidic,2.41 × 10-10 M 
B) acidic,2.41 × 10-11 M 
C) basic,2.41 × 10-10 M 
D) basic,2.41 × 10-11 M

Question 16

In the following reaction the unshaded spheres represent H atoms.  
-Identify the Br∅nsted-Lowry acids.

Accepted Answer

A) (1)and (3) 
B) (1)and (4) 
C) (2)and (3) 
D) (2)and (4) 
A) (1)and (3) 
B) (1)and (4) 
C) (2)and (3) 
D) (2)and (4)

Question 17

Acetic acid CH3COOH,has an acid dissociation constant of 1.8 × 10-5.What is the conjugate base of acetic acid and what is its base dissociation constant?

Accepted Answer

A) CH3C(OH)2+,5.6 × 104 
B) CH3C(OH)2+,5.6 × 10-10 
C) CH3COOH,5.6 × 10-10 
D) CH3CO2-,5.6 × 10-10 
A) CH3C(OH)2+,5.6 × 104 
B) CH3C(OH)2+,5.6 × 10-10 
C) CH3COOH,5.6 × 10-10 
D) CH3CO2-,5.6 × 10-10

Question 18

What is the pH of a solution prepared by diluting 75.00 mL of 0.10 M HCl with enough water to produce a total volume of 100.00 mL?

Accepted Answer

A) 1.00 
B) 1.12 
C) 2.00 
D) 2.24 
A) 1.00 
B) 1.12 
C) 2.00 
D) 2.24

Question 19

A solution with hydronium ion concentration [H+] = 1.60 × 10-2 M has a hydroxide ion concentration [OH-] = ________.

Accepted Answer

Question 20

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HClO4(aq)+ H2O(l)→ H3O+(aq)+ ClO4-(aq)
HNO2(aq)+ H2O(l)⇌ H3O+(aq)+ NO2-(aq)

Accepted Answer

A) HClO4 > H3O+ > HNO2 
B) HClO4 > HNO2 > H3O+ 
C) H3O+ > HClO4 > HNO2 
D) H3O+ > HNO2 > HClO4 
A) HClO4 > H3O+ > HNO2 
B) HClO4 > HNO2 > H3O+ 
C) H3O+ > HClO4 > HNO2 
D) H3O+ > HNO2 > HClO4

Exam 15: Aqueous Equilibria: Acids and Bases

What is the strongest acid of the following?

What is the strongest acid among the following?

What is the hydronium ion concentration of an acid rain sample that has a pH of 3.15?

Calculate the concentration of bicarbonate ion,HCO3-,in a 0.050 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

What is the hydronium ion concentration and the pH for an aqueous solution of NH3 that has a hydroxide ion concentration of

What is the pH of a 0.020 M HClO4 solution?

What is the strongest acid among the following?

Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10-4 M in hydroxide ion.

Which Br∅nsted-Lowry acid has the strongest conjugate base?

What is the conjugate acid of the Br∅nsted-Lowry base HAsO42-?

What is the pH of a 0.20 M H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10-4 and Ka2 = 1.0 × 10-11?

In the following reaction the unshaded spheres represent H atoms. -Identify the Br∅nsted-Lowry acid/base conjugate pairs.

The equilibrium constant for the reaction below has the value Ka = 3.5 × 10-4.In this reaction the stronger Br∅nsted-Lowry acid is ________ and the weaker Br∅nsted-Lowry acid is ________. HF(aq)+ H2O(l)⇌ H3O+(aq)+ F-(aq)

Normal rainfall has a concentration of OH- that is 3.99 × 10-9.The concentration of H3O+ in normal rainfall is

A solution with a hydroxide ion concentration of 4.15 × 10-4 M is ________ and has a hydrogen ion concentration of ________.

In the following reaction the unshaded spheres represent H atoms. -Identify the Br∅nsted-Lowry acids.

Acetic acid CH3COOH,has an acid dissociation constant of 1.8 × 10-5.What is the conjugate base of acetic acid and what is its base dissociation constant?

What is the pH of a solution prepared by diluting 75.00 mL of 0.10 M HCl with enough water to produce a total volume of 100.00 mL?

A solution with hydronium ion concentration [H+] = 1.60 × 10-2 M has a hydroxide ion concentration [OH-] = ________.

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HClO4(aq)+ H2O(l)→ H3O+(aq)+ ClO4-(aq) HNO2(aq)+ H2O(l)⇌ H3O+(aq)+ NO2-(aq)

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

Calculate the concentration of bicarbonate ion,HCO₃^-,in a 0.050 M H₂CO₃ solution that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

What is the hydronium ion concentration and the pH for an aqueous solution of NH₃ that has a hydroxide ion concentration of

What is the pH of a 0.020 M HClO₄ solution?

Calculate the hydronium ion concentration in an aqueous solution that contains 2.50 × 10^-4 M in hydroxide ion.

What is the conjugate acid of the Br∅nsted-Lowry base HAsO₄^2-?

What is the pH of a 0.20 M H₂Se solution that has the stepwise dissociation constants K_a1 = 1.3 × 10^-4 and K_a2 = 1.0 × 10^-11?

The equilibrium constant for the reaction below has the value K_a = 3.5 × 10^-4.In this reaction the stronger Br∅nsted-Lowry acid is and the weaker Br∅nsted-Lowry acid is . HF(aq)+ H₂O(l)⇌ H₃O⁺(aq)+ F^-(aq)

Normal rainfall has a concentration of OH^- that is 3.99 × 10^-9.The concentration of H₃O⁺ in normal rainfall is

A solution with a hydroxide ion concentration of 4.15 × 10^-4 M is and has a hydrogen ion concentration of .

Acetic acid CH₃COOH,has an acid dissociation constant of 1.8 × 10^-5.What is the conjugate base of acetic acid and what is its base dissociation constant?

A solution with hydronium ion concentration [H⁺] = 1.60 × 10^-2 M has a hydroxide ion concentration [OH^-] = ________.

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HClO₄(aq)+ H₂O(l)→ H₃O⁺(aq)+ ClO₄^-(aq) HNO₂(aq)+ H₂O(l)⇌ H₃O⁺(aq)+ NO₂^-(aq)