Question 1

When the following reaction goes in the reverse direction (from products to reactants), what is the acid? HCN(aq) + H2O(l) ⇌ CN-(aq) + H3O+(aq)

Accepted Answer

A) HCN 
B) H2O 
C) CN-  
D) H3O+  
E) both CN- and H3O+  
A) HCN 
B) H2O 
C) CN-  
D) H3O+  
E) both CN- and H3O+

Question 2

Select the strong acid from the following list.

Accepted Answer

A) H2SO3(aq) 
B) H2C2O4(aq) 
C) H2S(aq) 
D) HNO2(aq) 
E) HI(aq) 
A) H2SO3(aq) 
B) H2C2O4(aq) 
C) H2S(aq) 
D) HNO2(aq) 
E) HI(aq)

Question 3

Select the two Brønsted-Lowry bases in the following equation: NH3(aq) + H2O(aq) ⇌ NH4+(aq) + OH-(aq)

Accepted Answer

A) NH3 and H2O 
B) NH3 and OH-  
C) H2O and OH-  
D) NH3 and NH4+  
E) NH4+ and OH-  
A) NH3 and H2O 
B) NH3 and OH-  
C) H2O and OH-  
D) NH3 and NH4+  
E) NH4+ and OH-

Question 4

Select the solution below that is the most acidic.

Accepted Answer

A) [OH-] = 1.0 x 10-4 M 
B) [OH-] = 1.0 x 10-5 M 
C) [OH-] = 1.0 x 10-7 M 
D) [OH-] = 1.0 x 10-9 M 
E) [OH-] = 1.0 x 10-11 M 
A) [OH-] = 1.0 x 10-4 M 
B) [OH-] = 1.0 x 10-5 M 
C) [OH-] = 1.0 x 10-7 M 
D) [OH-] = 1.0 x 10-9 M 
E) [OH-] = 1.0 x 10-11 M

Question 5

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH3

Accepted Answer

A) I = HCl, II = HF, III = NH3  
B) I = HF, II = HCl, III = NH3  
C) I = HF, II = NH3, III = HCl 
D) I = NH3, II = HF, III = HCl 
E) I = NH3, II = HCl, III = HF 
A) I = HCl, II = HF, III = NH3  
B) I = HF, II = HCl, III = NH3  
C) I = HF, II = NH3, III = HCl 
D) I = NH3, II = HF, III = HCl 
E) I = NH3, II = HCl, III = HF

Question 6

Calculate the pH of a solution that has [H3O+] = 5.9 x 10-5 M.

Accepted Answer

A) pH = 5.90 
B) pH = 4.23 
C) pH = 5.00 
D) pH = 5.59 
E) pH = 9.77 
A) pH = 5.90 
B) pH = 4.23 
C) pH = 5.00 
D) pH = 5.59 
E) pH = 9.77

Question 7

When sodium hydroxide, NaOH, is dissolved in water, which species are present in addition to water?

Accepted Answer

A) NaOH(aq) 
B) Na+(aq) and OH-(aq) 
C) Na+(aq) and H3O+  
D) Na+(aq) and O2H22-  
E) NaO-(aq) and H3O+  
A) NaOH(aq) 
B) Na+(aq) and OH-(aq) 
C) Na+(aq) and H3O+  
D) Na+(aq) and O2H22-  
E) NaO-(aq) and H3O+

Question 8

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: HOCl(aq) + H2O(l) ⇌ OCl-(aq) + H3O+(aq)

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

If CH3NH2 is added to water, what other compound could also be added in order to make a buffered solution?

Accepted Answer

A) H2O 
B) NaOH 
C) CH3NH3Cl 
D) NaCH3NH2  
E) none of these is correct 
A) H2O 
B) NaOH 
C) CH3NH3Cl 
D) NaCH3NH2  
E) none of these is correct

Question 10

What is the pH of a 0.020 M HCl solution?

Accepted Answer

A) 0.020 
B) 1.70 
C) 7.00 
D) 12.30 
E) -1.70 
A) 0.020 
B) 1.70 
C) 7.00 
D) 12.30 
E) -1.70

Question 11

Which of the following ions is amphoteric?

Accepted Answer

A) Br-  
B) H-  
C) OH+  
D) SO42-  
E) HPO42-  
A) Br-  
B) H-  
C) OH+  
D) SO42-  
E) HPO42-

Question 12

Select the solution below that is the most acidic.

Accepted Answer

A) [OH-] = 1.0 x 10-4 M 
B) [OH-] = 1.0 x 10-5 M 
C) [H3O+] = 1.0 x 10-6 M 
D) [H3O+] = 1.0 x 10-8 M 
E) [H3O+] = 1.0 x 10-10 M 
A) [OH-] = 1.0 x 10-4 M 
B) [OH-] = 1.0 x 10-5 M 
C) [H3O+] = 1.0 x 10-6 M 
D) [H3O+] = 1.0 x 10-8 M 
E) [H3O+] = 1.0 x 10-10 M

Question 13

Given 0.10 M solutions of the following acids, which contains the lowest concentration of H3O+?

Accepted Answer

A) HF, Ka = 6.3 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) HOCl, Ka = 4.0 x 10-8  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4  
A) HF, Ka = 6.3 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) HOCl, Ka = 4.0 x 10-8  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4

Question 14

Which of the following is an amphoteric substance?

Accepted Answer

A) NaCl 
B) LiOH 
C) KBr 
D) NaHCO3  
E) CH3OH 
A) NaCl 
B) LiOH 
C) KBr 
D) NaHCO3  
E) CH3OH

Question 15

Select the pair that consists of an acid and its conjugate base in that order.

Accepted Answer

A) NH3/NH4+  
B) SO42-/HSO3-  
C) H2SO3/HSO3-  
D) H2PO4-/H3PO4  
E) CO32-/HCO32-  
A) NH3/NH4+  
B) SO42-/HSO3-  
C) H2SO3/HSO3-  
D) H2PO4-/H3PO4  
E) CO32-/HCO32-

Question 16

Calculate the pH of a solution that has [H3O+] = 3.1 x 10-8 M.

Accepted Answer

A) pH = 7.51 
B) pH = 8.00 
C) pH = 3.10 
D) pH = 3.18 
E) pH = 6.49 
A) pH = 7.51 
B) pH = 8.00 
C) pH = 3.10 
D) pH = 3.18 
E) pH = 6.49

Question 17

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

Accepted Answer

A) True 
 B)False

Question 18

If you take an antacid tablet, the pH in your stomach will increase.This means your stomach juice becomes more acidic.

Accepted Answer

A) True 
 B)False

Question 19

Select the two Brønsted-Lowry bases in the following equation: CO32-(aq) + H2O(l) ⇌ HCO3-(aq) + OH-(aq)

Accepted Answer

A) CO32- and H2O 
B) CO32- and HCO3-  
C) H2O and OH-  
D) CO32- and OH-  
E) H2O and HCO3-  
A) CO32- and H2O 
B) CO32- and HCO3-  
C) H2O and OH-  
D) CO32- and OH-  
E) H2O and HCO3-

Question 20

List the species present in order of increasing concentration in a 0.1 M solution of H2C2O4.

Accepted Answer

A) H2C2O4 2O4- 2O42-  
B) H2C2O4 2O42- 2O4-  
C) C2O42- 2O4- 2C2O4  
D) HC2O4- 2O42- 2C2O4  
E) C2O42- 2C2O4 2O4-  
A) H2C2O4 2O4- 2O42-  
B) H2C2O4 2O42- 2O4-  
C) C2O42- 2O4- 2C2O4  
D) HC2O4- 2O42- 2C2O4  
E) C2O42- 2C2O4 2O4-

When the following reaction goes in the reverse direction (from products to reactants), what is the acid? HCN(aq) + H₂O(l) ⇌ CN^-(aq) + H₃O⁺(aq)

Select the strong acid from the following list.

Select the two Brønsted-Lowry bases in the following equation: NH₃(aq) + H₂O(aq) ⇌ NH₄⁺(aq) + OH^-(aq)

Select the solution below that is the most acidic.

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH₃

Calculate the pH of a solution that has [H₃O⁺] = 5.9 x 10^-5M.

When sodium hydroxide, NaOH, is dissolved in water, which species are present in addition to water?

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: HOCl(aq) + H₂O(l) ⇌ OCl^-(aq) + H₃O⁺(aq)

If CH₃NH₂ is added to water, what other compound could also be added in order to make a buffered solution?

What is the pH of a 0.020 M HCl solution?

Which of the following ions is amphoteric?

Select the solution below that is the most acidic.

Given 0.10 M solutions of the following acids, which contains the lowest concentration of H₃O⁺?

Which of the following is an amphoteric substance?

Select the pair that consists of an acid and its conjugate base in that order.

Calculate the pH of a solution that has [H₃O⁺] = 3.1 x 10^-8M.

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

If you take an antacid tablet, the pH in your stomach will increase.This means your stomach juice becomes more acidic.

Select the two Brønsted-Lowry bases in the following equation: CO₃^2-(aq) + H₂O(l) ⇌ HCO₃^-(aq) + OH^-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H₂C₂O₄.

Matter and Energy

Atoms, Ions, and the Periodic Table

Chemical Compounds

Chemical Composition

Chemical Reactions and Equations

Quantities in Chemical Reactions

Electron Structure of the Atom

Chemical Bonding

The Gaseous State

The Liquid and Solid States

Solutions

Reaction Rates and Chemical Equilibrium

Oxidation-Reduction Reactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 13: Acids and Bases

When the following reaction goes in the reverse direction (from products to reactants), what is the acid? HCN(aq) + H2O(l) ⇌ CN-(aq) + H3O+(aq)

Select the strong acid from the following list.

Select the two Brønsted-Lowry bases in the following equation: NH3(aq) + H2O(aq) ⇌ NH4+(aq) + OH-(aq)

Select the solution below that is the most acidic.

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH3

Calculate the pH of a solution that has [H3O+] = 5.9 x 10-5 M.

When sodium hydroxide, NaOH, is dissolved in water, which species are present in addition to water?

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: HOCl(aq) + H2O(l) ⇌ OCl-(aq) + H3O+(aq)

If CH3NH2 is added to water, what other compound could also be added in order to make a buffered solution?

What is the pH of a 0.020 M HCl solution?

Which of the following ions is amphoteric?

Select the solution below that is the most acidic.

Given 0.10 M solutions of the following acids, which contains the lowest concentration of H3O+?

Which of the following is an amphoteric substance?

Select the pair that consists of an acid and its conjugate base in that order.

Calculate the pH of a solution that has [H3O+] = 3.1 x 10-8 M.

In polyprotic acids, the first ionizable hydrogen always ionizes to a greater extent than the second or third ionizable hydrogen(s).

If you take an antacid tablet, the pH in your stomach will increase.This means your stomach juice becomes more acidic.

Select the two Brønsted-Lowry bases in the following equation: CO32-(aq) + H2O(l) ⇌ HCO3-(aq) + OH-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H2C2O4.

Matter and Energy

Atoms, Ions, and the Periodic Table

Chemical Compounds

Chemical Composition

Chemical Reactions and Equations

Quantities in Chemical Reactions

Electron Structure of the Atom

Chemical Bonding

The Gaseous State

The Liquid and Solid States

Solutions

Reaction Rates and Chemical Equilibrium

Oxidation-Reduction Reactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

When the following reaction goes in the reverse direction (from products to reactants), what is the acid? HCN(aq) + H₂O(l) ⇌ CN^-(aq) + H₃O⁺(aq)

Select the two Brønsted-Lowry bases in the following equation: NH₃(aq) + H₂O(aq) ⇌ NH₄⁺(aq) + OH^-(aq)

Match the molecular-level diagrams to each of the following compounds in aqueous solution: HCl, HF, NH₃

Calculate the pH of a solution that has [H₃O⁺] = 5.9 x 10^-5M.

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: HOCl(aq) + H₂O(l) ⇌ OCl^-(aq) + H₃O⁺(aq)

If CH₃NH₂ is added to water, what other compound could also be added in order to make a buffered solution?

Given 0.10 M solutions of the following acids, which contains the lowest concentration of H₃O⁺?

Calculate the pH of a solution that has [H₃O⁺] = 3.1 x 10^-8M.

Select the two Brønsted-Lowry bases in the following equation: CO₃^2-(aq) + H₂O(l) ⇌ HCO₃^-(aq) + OH^-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H₂C₂O₄.