Question 1

Which of the following ions is amphoteric?

Accepted Answer

A) Cl-  
B) OH-  
C) H+  
D) NO3-  
E) HCO3-  
A) Cl-  
B) OH-  
C) H+  
D) NO3-  
E) HCO3-

Question 2

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

Accepted Answer

A) NH3/NH4+  
B) HCO3-/CO32-  
C) H2CO3/HCO3-  
D) H3PO4/ HPO42-  
E) CO32-/CO22-  
A) NH3/NH4+  
B) HCO3-/CO32-  
C) H2CO3/HCO3-  
D) H3PO4/ HPO42-  
E) CO32-/CO22-

Question 3

The conjugate base of H2PO4- is:

Accepted Answer

A) HPO42-  
B) H2PO3-  
C) H3PO4  
D) PO43-  
E) H2PO4OH-  
A) HPO42-  
B) H2PO3-  
C) H3PO4  
D) PO43-  
E) H2PO4OH-

Question 4

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HCN, Ka = 6.2 x 10-10; NH4+, Ka = 5.6 x 10-10; CH3CO2H, Ka = 1.8 x 10-5

Accepted Answer

A) HCN 4+ 3CO2H 
B) HCN 3CO2H 4+  
C) CH3CO2H 4+ 3CO2H 4+  
A) HCN 4+ 3CO2H 
B) HCN 3CO2H 4+  
C) CH3CO2H 4+ 3CO2H 4+

Question 5

The image shows a molecular-level representation of part of a solution after HF is dissolved in water.(Besides water, there are 6 HF molecules, 1 H3O+ ion, and 1 F- ion present in the solution.) Which of the following best describes HF?

Accepted Answer

A) strong acid 
B) strong base 
C) weak acid 
D) weak base 
E) amphoteric 
A) strong acid 
B) strong base 
C) weak acid 
D) weak base 
E) amphoteric

Question 6

When acetate ion, CH3CO2-, reacts with water, what are the products?

Accepted Answer

A) H+(aq) and OH-(aq) 
B) CH3CO2+(aq) and OH-(aq) 
C) CH3CO2+(aq) and H2O(aq) 
D) CH3CO2+(aq) and H-(aq) 
E) CH3CO2H(aq) and OH-(aq) 
A) H+(aq) and OH-(aq) 
B) CH3CO2+(aq) and OH-(aq) 
C) CH3CO2+(aq) and H2O(aq) 
D) CH3CO2+(aq) and H-(aq) 
E) CH3CO2H(aq) and OH-(aq)

Question 7

Which of the following statements regarding acids is incorrect?

Accepted Answer

A) An acid will react with an active metal. 
B) An acid is a substance that will change the color of blue litmus paper. 
C) An acid is a substance that tastes sour. 
D) An acid is a substance that produces hydrogen ions, H+, (or H3O+) in aqueous solution. 
E) An acid is always a strong electrolyte. 
A) An acid will react with an active metal. 
B) An acid is a substance that will change the color of blue litmus paper. 
C) An acid is a substance that tastes sour. 
D) An acid is a substance that produces hydrogen ions, H+, (or H3O+) in aqueous solution. 
E) An acid is always a strong electrolyte.

Question 8

When carbonate ion, CO32-, reacts with water, what are the products?

Accepted Answer

A) H+(aq) and OH-(aq) 
B) HCO3(aq) and OH-(aq) 
C) HCO3+(aq) and H2O(aq) 
D) HCO3-(aq) and H-(aq) 
E) HCO3-(aq) and OH-(aq) 
A) H+(aq) and OH-(aq) 
B) HCO3(aq) and OH-(aq) 
C) HCO3+(aq) and H2O(aq) 
D) HCO3-(aq) and H-(aq) 
E) HCO3-(aq) and OH-(aq)

Question 9

Which of the following is the strongest acid?

Accepted Answer

A) HNO2, Ka = 5.6 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) NH4+, Ka = 5.6 x 10-10  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4  
A) HNO2, Ka = 5.6 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) NH4+, Ka = 5.6 x 10-10  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4

Question 10

Which of the following ionizes to the greatest extent?

Accepted Answer

A) HNO2, Ka = 5.6 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) NH4+, Ka = 5.6 x 10-10  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4  
A) HNO2, Ka = 5.6 x 10-4  
B) HCN, Ka = 6.2 x 10-10  
C) NH4+, Ka = 5.6 x 10-10  
D) CH3CO2H, Ka = 1.8 x 10-5  
E) HCO2H, Ka = 1.8 x 10-4

Question 11

Calculate the H3O+ concentration in 0.0010 M HCl.

Accepted Answer

A) 1.0 x 10-2 M 
B) 1.0 x 10-3 M 
C) 1.0 x 103 M 
D) 1.0 x 102M 
E) 3.0M 
A) 1.0 x 10-2 M 
B) 1.0 x 10-3 M 
C) 1.0 x 103 M 
D) 1.0 x 102M 
E) 3.0M

Question 12

Calculate the pOH of a solution that has [H3O+] = 5.2 x 10-7 M.

Accepted Answer

A) pOH = 7.72 
B) pOH = 7.00 
C) pOH = 6.28 
D) pOH = 5.27 
E) pOH = 5.20 
A) pOH = 7.72 
B) pOH = 7.00 
C) pOH = 6.28 
D) pOH = 5.27 
E) pOH = 5.20

Question 13

The image shows a molecular-level representation of part of a solution after HCl is dissolved in water.What best describes this image? (Besides water, there are 6 H3O+ ions and 6 Cl- ions present in the solution.) Which of the following best describes HCl?

Accepted Answer

A) strong acid 
B) strong base 
C) weak acid 
D) weak base 
E) amphoteric 
A) strong acid 
B) strong base 
C) weak acid 
D) weak base 
E) amphoteric

Question 14

The Ka for acetic acid is 1.8 x 10-5.Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

Accepted Answer

A) The pH is greater than 0 but less than 2. 
B) The pH is exactly 2. 
C) The pH is greater than 2 but less than 7. 
D) The pH is exactly 7. 
E) The pH is greater than 7 but less than 12. 
A) The pH is greater than 0 but less than 2. 
B) The pH is exactly 2. 
C) The pH is greater than 2 but less than 7. 
D) The pH is exactly 7. 
E) The pH is greater than 7 but less than 12.

Question 15

All of the following species are weak bases except:

Accepted Answer

A) KCN(aq) 
B) NaNO2(aq) 
C) LiCl(aq) 
D) C6H5NH2(aq) 
E) CH3CH2NH2(aq) 
A) KCN(aq) 
B) NaNO2(aq) 
C) LiCl(aq) 
D) C6H5NH2(aq) 
E) CH3CH2NH2(aq)

Question 16

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

Accepted Answer

A) HF 
B) H2O 
C) F-  
D) H3O+  
E) both F- and H3O+  
A) HF 
B) H2O 
C) F-  
D) H3O+  
E) both F- and H3O+

Question 17

Calculate the pH of a solution that has [H3O+] = 1.0 x 10-6 M.

Accepted Answer

A) pH = 1.00 
B) pH = 7.00 
C) pH = 6.00 
D) pH = 8.00 
E) pH = 14.00 
A) pH = 1.00 
B) pH = 7.00 
C) pH = 6.00 
D) pH = 8.00 
E) pH = 14.00

Question 18

Which of the following equations represents the behavior of HCO3- as an acid?

Accepted Answer

A) HCO3-(aq) + H3O+(aq) ⇌ H2CO3(aq) + H2O(l) 
B) HCO3-(aq) + HF(aq) ⇌ H2CO3(aq) + F-(aq) 
C) HCO3-(aq) + HCN(aq) ⇌ H2CO3(aq) + CN-(aq) 
D) HCO3-(aq) + OH-(aq) ⇌ CO32-(aq) + H2O(l) 
E) HCO3-(aq) + H2O(l) ⇌ H2CO3(aq) + OH-(aq) 
A) HCO3-(aq) + H3O+(aq) ⇌ H2CO3(aq) + H2O(l) 
B) HCO3-(aq) + HF(aq) ⇌ H2CO3(aq) + F-(aq) 
C) HCO3-(aq) + HCN(aq) ⇌ H2CO3(aq) + CN-(aq) 
D) HCO3-(aq) + OH-(aq) ⇌ CO32-(aq) + H2O(l) 
E) HCO3-(aq) + H2O(l) ⇌ H2CO3(aq) + OH-(aq)

Question 19

What is the pH of a 0.015 M NaOH solution?

Accepted Answer

A) 0.015 
B) 1.82 
C) 7.00 
D) 12.18 
E) -1.82 
A) 0.015 
B) 1.82 
C) 7.00 
D) 12.18 
E) -1.82

Question 20

Which of the following is the strongest acid?

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

Which of the following ions is amphoteric?

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

The conjugate base of H₂PO₄^- is:

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HCN, K_a = 6.2 x 10^-10; NH₄⁺, K_a = 5.6 x 10^-10; CH₃CO₂H, K_a = 1.8 x 10^-5

The image shows a molecular-level representation of part of a solution after HF is dissolved in water.(Besides water, there are 6 HF molecules, 1 H₃O⁺ ion, and 1 F^- ion present in the solution.) Which of the following best describes HF?

When acetate ion, CH₃CO₂^-, reacts with water, what are the products?

Which of the following statements regarding acids is incorrect?

When carbonate ion, CO₃^2-, reacts with water, what are the products?

Which of the following is the strongest acid?

Which of the following ionizes to the greatest extent?

Calculate the H₃O⁺ concentration in 0.0010 M HCl.

Calculate the pOH of a solution that has [H₃O⁺] = 5.2 x 10^-7M.

The image shows a molecular-level representation of part of a solution after HCl is dissolved in water.What best describes this image? (Besides water, there are 6 H₃O⁺ ions and 6 Cl^- ions present in the solution.) Which of the following best describes HCl?

The K_a for acetic acid is 1.8 x 10^-5.Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

All of the following species are weak bases except:

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

Calculate the pH of a solution that has [H₃O⁺] = 1.0 x 10^-6M.

Which of the following equations represents the behavior of HCO₃^- as an acid?

What is the pH of a 0.015 M NaOH solution?

Which of the following is the strongest acid?

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

Which of the following ions is amphoteric?

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

The conjugate base of H2PO4- is:

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HCN, Ka = 6.2 x 10-10; NH4+, Ka = 5.6 x 10-10; CH3CO2H, Ka = 1.8 x 10-5

The image shows a molecular-level representation of part of a solution after HF is dissolved in water.(Besides water, there are 6 HF molecules, 1 H3O+ ion, and 1 F- ion present in the solution.) Which of the following best describes HF?

When acetate ion, CH3CO2-, reacts with water, what are the products?

Which of the following statements regarding acids is incorrect?

When carbonate ion, CO32-, reacts with water, what are the products?

Which of the following is the strongest acid?

Which of the following ionizes to the greatest extent?

Calculate the H3O+ concentration in 0.0010 M HCl.

Calculate the pOH of a solution that has [H3O+] = 5.2 x 10-7 M.

The image shows a molecular-level representation of part of a solution after HCl is dissolved in water.What best describes this image? (Besides water, there are 6 H3O+ ions and 6 Cl- ions present in the solution.) Which of the following best describes HCl?

The Ka for acetic acid is 1.8 x 10-5.Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

All of the following species are weak bases except:

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

Calculate the pH of a solution that has [H3O+] = 1.0 x 10-6 M.

Which of the following equations represents the behavior of HCO3- as an acid?

What is the pH of a 0.015 M NaOH solution?

Which of the following is the strongest acid?

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

The conjugate base of H₂PO₄^- is:

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HCN, K_a = 6.2 x 10^-10; NH₄⁺, K_a = 5.6 x 10^-10; CH₃CO₂H, K_a = 1.8 x 10^-5

The image shows a molecular-level representation of part of a solution after HF is dissolved in water.(Besides water, there are 6 HF molecules, 1 H₃O⁺ ion, and 1 F^- ion present in the solution.) Which of the following best describes HF?

When acetate ion, CH₃CO₂^-, reacts with water, what are the products?

When carbonate ion, CO₃^2-, reacts with water, what are the products?

Calculate the H₃O⁺ concentration in 0.0010 M HCl.

Calculate the pOH of a solution that has [H₃O⁺] = 5.2 x 10^-7M.

The image shows a molecular-level representation of part of a solution after HCl is dissolved in water.What best describes this image? (Besides water, there are 6 H₃O⁺ ions and 6 Cl^- ions present in the solution.) Which of the following best describes HCl?

The K_a for acetic acid is 1.8 x 10^-5.Which of the following statements best describes the pH of a 0.010 M solution of acetic acid?

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

Calculate the pH of a solution that has [H₃O⁺] = 1.0 x 10^-6M.

Which of the following equations represents the behavior of HCO₃^- as an acid?