Question 1

Which of the following will not change when an acid is added to water?

Accepted Answer

A) pH 
B) pOH 
C) Kw 
D) hydronium ion concentration 
E) hydroxide ion concentration 
A) pH 
B) pOH 
C) Kw 
D) hydronium ion concentration 
E) hydroxide ion concentration

Question 2

If the pH of a coffee sample is 5.15, what is the H3O+ concentration in the coffee?

Accepted Answer

A) 5.2 M 
B) 7.1 × 10-8 M 
C) 7.1 × 10-7 M 
D) 7.1 × 10-6 M 
E) 8.8 M 
A) 5.2 M 
B) 7.1 × 10-8 M 
C) 7.1 × 10-7 M 
D) 7.1 × 10-6 M 
E) 8.8 M

Question 3

The substance NaOH(aq)is

Accepted Answer

A) a strong acid. 
B) a weak acid. 
C) a strong base. 
D) a weak base. 
E) neither an acid nor a base. 
A) a strong acid. 
B) a weak acid. 
C) a strong base. 
D) a weak base. 
E) neither an acid nor a base.

Question 4

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−

Question 5

All of the following species are weak bases except:

Accepted Answer

A) NaCN(aq) 
B) K2CO3(aq) 
C) KOH(aq) 
D) CH3NH2(aq) 
E) NH3(aq) 
A) NaCN(aq) 
B) K2CO3(aq) 
C) KOH(aq) 
D) CH3NH2(aq) 
E) NH3(aq)

Question 6

If Na2HPO4 is added to water, what other compound could also be added in order to make a buffered solution?

Accepted Answer

A) H3PO4 
B) NaHPO4 
C) NaH2PO4 
D) Na2PO3 
E) NaCl 
A) H3PO4 
B) NaHPO4 
C) NaH2PO4 
D) Na2PO3 
E) NaCl

Question 7

The H3O+ concentration in a 0.010 M solution of NaOH is 0.010 M.

Accepted Answer

A) True 
 B)False

Question 8

In pure water at 25°C, the concentration of H3O+ is equal to the concentration of OH-.

Accepted Answer

A) True 
 B)False

Question 9

Given an OH− concentration of 1.0 × 10−4 M, calculate the H3O+ concentration, and then identify the solution as acidic, basic, or neutral.

Accepted Answer

A) [H3O+] = 1.0 × 10-7, neutral 
B) [H3O+] = 1.0 × 10-4, acidic 
C) [H3O+] = 1.0 × 10-10, acidic 
D) [H3O+] = 1.0 × 10-10, basic 
E) [H3O+] = 1.0 × 10-4, basic 
A) [H3O+] = 1.0 × 10-7, neutral 
B) [H3O+] = 1.0 × 10-4, acidic 
C) [H3O+] = 1.0 × 10-10, acidic 
D) [H3O+] = 1.0 × 10-10, basic 
E) [H3O+] = 1.0 × 10-4, basic

Question 10

The substance Mg(OH)2(aq)is

Accepted Answer

A) a strong acid. 
B) a weak acid. 
C) a strong base. 
D) a weak base. 
E) neither an acid nor a base. 
A) a strong acid. 
B) a weak acid. 
C) a strong base. 
D) a weak base. 
E) neither an acid nor a base.

Question 11

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 12

Which of the following acids is not normally found in foods or beverages?

Accepted Answer

A) citric acid 
B) acetic acid 
C) phosphoric acid 
D) carbonic acid 
E) sulfuric acid 
A) citric acid 
B) acetic acid 
C) phosphoric acid 
D) carbonic acid 
E) sulfuric acid

Question 13

If the pH of a blood sample is 7.60, what is the H3O+ concentration in the blood?

Accepted Answer

A) 7.6 M 
B) 2.5 × 10-8 M 
C) 2.5 × 10-7 M 
D) 2.5 × 10-9 M 
E) 6.4 M 
A) 7.6 M 
B) 2.5 × 10-8 M 
C) 2.5 × 10-7 M 
D) 2.5 × 10-9 M 
E) 6.4 M

Question 14

Select the solution below that is the most acidic.

Accepted Answer

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

Question 15

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 16

Given an H3O+ concentration of 1.0 × 10-4 M, calculate the OH- concentration, and then identify the solution as acidic, basic, or neutral.

Accepted Answer

A) [OH-] = 1.0 × 10-7, neutral 
B) [OH-] = 1.0 × 10-4, acidic 
C) [OH-] = 1.0 × 10-10, acidic 
D) [OH-] = 1.0 × 10-10, basic 
E) [OH-] = 1.0 × 10-4, basic 
A) [OH-] = 1.0 × 10-7, neutral 
B) [OH-] = 1.0 × 10-4, acidic 
C) [OH-] = 1.0 × 10-10, acidic 
D) [OH-] = 1.0 × 10-10, basic 
E) [OH-] = 1.0 × 10-4, basic

Question 17

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 18

If NaH2PO4 is added to water, what other compound or compounds could also be added in order to make a buffered solution?

Accepted Answer

A) H3PO4 only 
B) NaHPO4 only 
C) Na2HPO4 only 
D) Na2PO3 only 
E) either H3PO4 or Na2HPO4 
A) H3PO4 only 
B) NaHPO4 only 
C) Na2HPO4 only 
D) Na2PO3 only 
E) either H3PO4 or Na2HPO4

Question 19

Calculate the pH of a solution that has [H3O+] = 5.9 × 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 20

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: CH3CO2H(aq)+ H2O(l)⇌ CH3CO2−(aq)+ H3O+(aq)

Accepted Answer

A) CH3CO2H, H2O, CH3CO2−, H3O+ 
B) H2O, CH3CO2H, CH3CO2−, H3O+ 
C) CH3CO2H, H2O, H3O+, CH3CO2− 
D) H2O, CH3CO2H, H3O+, CH3CO2− 
E) CH3CO2−, H3O+, H2O, CH3CO2H 
A) CH3CO2H, H2O, CH3CO2−, H3O+ 
B) H2O, CH3CO2H, CH3CO2−, H3O+ 
C) CH3CO2H, H2O, H3O+, CH3CO2− 
D) H2O, CH3CO2H, H3O+, CH3CO2− 
E) CH3CO2−, H3O+, H2O, CH3CO2H

Which of the following will not change when an acid is added to water?

If the pH of a coffee sample is 5.15, what is the H₃O⁺ concentration in the coffee?

The substance NaOH(aq)is

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

All of the following species are weak bases except:

If Na₂HPO₄ is added to water, what other compound could also be added in order to make a buffered solution?

The H₃O⁺ concentration in a 0.010 M solution of NaOH is 0.010 M.

In pure water at 25°C, the concentration of H₃O⁺ is equal to the concentration of OH^-.

Given an OH⁻ concentration of 1.0 × 10⁻⁴ M, calculate the H₃O⁺ concentration, and then identify the solution as acidic, basic, or neutral.

The substance Mg(OH)₂(aq)is

Which of the following is an amphoteric substance?

Which of the following acids is not normally found in foods or beverages?

If the pH of a blood sample is 7.60, what is the H₃O⁺ concentration in the blood?

Select the solution below that is the most acidic.

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

Given an H₃O⁺ concentration of 1.0 × 10^-4 M, calculate the OH^- concentration, and then identify the solution as acidic, basic, or neutral.

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

If NaH₂PO₄ is added to water, what other compound or compounds could also be added in order to make a buffered solution?

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

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: CH₃CO₂H(aq)+ H₂O(l)⇌ CH₃CO₂⁻(aq)+ H₃O⁺(aq)

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 will not change when an acid is added to water?

If the pH of a coffee sample is 5.15, what is the H3O+ concentration in the coffee?

The substance NaOH(aq)is

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

All of the following species are weak bases except:

If Na2HPO4 is added to water, what other compound could also be added in order to make a buffered solution?

The H3O+ concentration in a 0.010 M solution of NaOH is 0.010 M.

In pure water at 25°C, the concentration of H3O+ is equal to the concentration of OH-.

Given an OH− concentration of 1.0 × 10−4 M, calculate the H3O+ concentration, and then identify the solution as acidic, basic, or neutral.

The substance Mg(OH)2(aq)is

Which of the following is an amphoteric substance?

Which of the following acids is not normally found in foods or beverages?

If the pH of a blood sample is 7.60, what is the H3O+ concentration in the blood?

Select the solution below that is the most acidic.

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

Given an H3O+ concentration of 1.0 × 10-4 M, calculate the OH- concentration, and then identify the solution as acidic, basic, or neutral.

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

If NaH2PO4 is added to water, what other compound or compounds could also be added in order to make a buffered solution?

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

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: CH3CO2H(aq)+ H2O(l)⇌ CH3CO2−(aq)+ H3O+(aq)

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

If the pH of a coffee sample is 5.15, what is the H₃O⁺ concentration in the coffee?

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

If Na₂HPO₄ is added to water, what other compound could also be added in order to make a buffered solution?

The H₃O⁺ concentration in a 0.010 M solution of NaOH is 0.010 M.

In pure water at 25°C, the concentration of H₃O⁺ is equal to the concentration of OH^-.

Given an OH⁻ concentration of 1.0 × 10⁻⁴ M, calculate the H₃O⁺ concentration, and then identify the solution as acidic, basic, or neutral.

The substance Mg(OH)₂(aq)is

If the pH of a blood sample is 7.60, what is the H₃O⁺ concentration in the blood?

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

Given an H₃O⁺ concentration of 1.0 × 10^-4 M, calculate the OH^- concentration, and then identify the solution as acidic, basic, or neutral.

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

If NaH₂PO₄ is added to water, what other compound or compounds could also be added in order to make a buffered solution?

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

List the acid, base, conjugate acid, and conjugate base, in that order, for the following reaction: CH₃CO₂H(aq)+ H₂O(l)⇌ CH₃CO₂⁻(aq)+ H₃O⁺(aq)