Question 1

All of the following species are weak bases except:

Accepted Answer

A) NH3(aq) 
B) Na2CO3(aq) 
C) KF(aq) 
D) CH3NH2(aq) 
E) NH4Cl(aq) 
A) NH3(aq) 
B) Na2CO3(aq) 
C) KF(aq) 
D) CH3NH2(aq) 
E) NH4Cl(aq)

Question 2

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

Accepted Answer

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

Question 3

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 4

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HOCl, Ka = 4.0 × 10−8; HCN, Ka = 6.2 × 10−10; NH4+, Ka = 5.6 × 10−10

Accepted Answer

A) HOCl 4+ 
B) HOCl 4+ 4+ 4+ 
E) NH4+ < HCN < HOCl 
A) HOCl 4+ 
B) HOCl 4+ 4+ 4+ 
E) NH4+ < HCN < HOCl

Question 5

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

Accepted Answer

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

Question 6

If the pOH of an orange juice sample is 10.38, what is the H3O+ concentration in the orange juice?

Accepted Answer

A) 10. M 
B) 2.4 × 10-4 M 
C) 2.4 × 10-10 M 
D) 4.2 × 10-11 M 
E) 3.6 M 
A) 10. M 
B) 2.4 × 10-4 M 
C) 2.4 × 10-10 M 
D) 4.2 × 10-11 M 
E) 3.6 M

Question 7

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 8

Select the two Brønsted-Lowry acids in the following equation: HNO2(aq)+ H2O(l)⇌ NO2−(aq)+ H3O+(aq)

Accepted Answer

A) HNO2 and H2O 
B) HNO2 and NO2− 
C) HNO2 and H3O+ 
D) H2O and H3O+ 
E) NO2− and H3O+ 
A) HNO2 and H2O 
B) HNO2 and NO2− 
C) HNO2 and H3O+ 
D) H2O and H3O+ 
E) NO2− and H3O+

Question 9

The conjugate acid of H2PO4− is:

Accepted Answer

A) HPO42− 
B) H2PO3− 
C) H3PO4 
D) PO43− 
E) H3PO3 
A) HPO42− 
B) H2PO3− 
C) H3PO4 
D) PO43− 
E) H3PO3

Question 10

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

Accepted Answer

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

Question 11

The conjugate acid of HCO3− is:

Accepted Answer

A) H2CO3 
B) HCO2− 
C) CO32− 
D) CO2 
E) H3CO3+ 
A) H2CO3 
B) HCO2− 
C) CO32− 
D) CO2 
E) H3CO3+

Question 12

Which of the following is an amphoteric substance?

Accepted Answer

A) NaOH 
B) LiCl 
C) CsBr 
D) H2O 
E) CH4 
A) NaOH 
B) LiCl 
C) CsBr 
D) H2O 
E) CH4

Question 13

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

Question 14

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HF, Ka = 6.3 × 10−4; HCN, Ka = 6.2 × 10−10; HOCl, Ka = 4.0 × 10−8

Accepted Answer

A) HF < HCN < HOCl 
B) HF < HOCl < HCN 
C) HOCl < HF < HCN 
D) HOCl < HCN < HF 
E) HCN < HOCl < HF 
A) HF < HCN < HOCl 
B) HF < HOCl < HCN 
C) HOCl < HF < HCN 
D) HOCl < HCN < HF 
E) HCN < HOCl < HF

Question 15

Calculate the pH of a solution that has [OH-] = 5.2 × 10-7 M.

Accepted Answer

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

Question 16

Select the two Brønsted-Lowry acids in the following equation: CO32-(aq)+ HF(aq)⇌ HCO3-(aq)+ F-(aq)

Accepted Answer

A) CO32- and HF 
B) CO32- and HCO3- 
C) HF and F- 
D) CO32- and F- 
E) HF and HCO3- 
A) CO32- and HF 
B) CO32- and HCO3- 
C) HF and F- 
D) CO32- and F- 
E) HF and HCO3-

Question 17

List the species present in order of increasing concentration in a 0.1 M solution of H2Se.

Accepted Answer

A) H2Se 2− 
B) H2Se 2− − 
C) Se2- 2Se 
D) HSe- 2- 2Se 
E) Se2− 2Se − 
A) H2Se 2− 
B) H2Se 2− − 
C) Se2- 2Se 
D) HSe- 2- 2Se 
E) Se2− 2Se −

Question 18

Select the solution below that is the most basic.

Accepted Answer

A) [OH-] = 1.0 × 10-10 M 
B) [OH-] = 1.0 × 10-4 M 
C) [H3O+] = 1.0 × 10-6 M 
D) [H3O+] = 1.0 × 10-7 M 
E) [H3O+] = 1.0 × 10-9 M 
A) [OH-] = 1.0 × 10-10 M 
B) [OH-] = 1.0 × 10-4 M 
C) [H3O+] = 1.0 × 10-6 M 
D) [H3O+] = 1.0 × 10-7 M 
E) [H3O+] = 1.0 × 10-9 M

Question 19

Select the solution below that is the most acidic.

Accepted Answer

A) [H3O+] = 1.0 × 10-4 M 
B) [H3O+] = 1.0 × 10-6 M 
C) [H3O+] = 1.0 × 10-7 M 
D) [H3O+] = 1.0 × 10-8 M 
E) [H3O+] = 1.0 × 10-10 M 
A) [H3O+] = 1.0 × 10-4 M 
B) [H3O+] = 1.0 × 10-6 M 
C) [H3O+] = 1.0 × 10-7 M 
D) [H3O+] = 1.0 × 10-8 M 
E) [H3O+] = 1.0 × 10-10 M

Question 20

If the pH of a certain soft drink is 3.60, what is the H3O+ concentration in the soft drink?

Accepted Answer

A) 3.6 M 
B) 2.5 × 10-3 M 
C) 2.5 × 10-5 M 
D) 2.5 × 10-4 M 
E) 10. M 
A) 3.6 M 
B) 2.5 × 10-3 M 
C) 2.5 × 10-5 M 
D) 2.5 × 10-4 M 
E) 10. M

All of the following species are weak bases except:

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

Which of the following ions is amphoteric?

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HOCl, K_a = 4.0 × 10⁻⁸; HCN, K_a = 6.2 × 10⁻¹⁰; NH₄⁺, K_a = 5.6 × 10⁻¹⁰

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

If the pOH of an orange juice sample is 10.38, what is the H₃O⁺ concentration in the orange juice?

What is the pH of a 0.020 M HCl solution?

Select the two Brønsted-Lowry acids in the following equation: HNO₂(aq)+ H₂O(l)⇌ NO₂⁻(aq)+ H₃O⁺(aq)

The conjugate acid of H₂PO₄⁻ is:

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

The conjugate acid of HCO₃⁻ is:

Which of the following is an amphoteric substance?

Select the solution below that is the most acidic.

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HF, K_a = 6.3 × 10⁻⁴; HCN, K_a = 6.2 × 10⁻¹⁰; HOCl, K_a = 4.0 × 10⁻⁸

Calculate the pH of a solution that has [OH^-] = 5.2 × 10^-7 M.

Select the two Brønsted-Lowry acids in the following equation: CO₃^2-(aq)+ HF(aq)⇌ HCO₃^-(aq)+ F^-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H₂Se.

Select the solution below that is the most basic.

Select the solution below that is the most acidic.

If the pH of a certain soft drink is 3.60, what is the H₃O⁺ concentration in the soft drink?

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

All of the following species are weak bases except:

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

Which of the following ions is amphoteric?

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HOCl, Ka = 4.0 × 10−8; HCN, Ka = 6.2 × 10−10; NH4+, Ka = 5.6 × 10−10

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

If the pOH of an orange juice sample is 10.38, what is the H3O+ concentration in the orange juice?

What is the pH of a 0.020 M HCl solution?

Select the two Brønsted-Lowry acids in the following equation: HNO2(aq)+ H2O(l)⇌ NO2−(aq)+ H3O+(aq)

The conjugate acid of H2PO4− is:

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

The conjugate acid of HCO3− is:

Which of the following is an amphoteric substance?

Select the solution below that is the most acidic.

Rank the following 0.100 M solutions in order of increasing H3O+ concentration: HF, Ka = 6.3 × 10−4; HCN, Ka = 6.2 × 10−10; HOCl, Ka = 4.0 × 10−8

Calculate the pH of a solution that has [OH-] = 5.2 × 10-7 M.

Select the two Brønsted-Lowry acids in the following equation: CO32-(aq)+ HF(aq)⇌ HCO3-(aq)+ F-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H2Se.

Select the solution below that is the most basic.

Select the solution below that is the most acidic.

If the pH of a certain soft drink is 3.60, what is the H3O+ concentration in the soft drink?

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

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

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HOCl, K_a = 4.0 × 10⁻⁸; HCN, K_a = 6.2 × 10⁻¹⁰; NH₄⁺, K_a = 5.6 × 10⁻¹⁰

If the pOH of an orange juice sample is 10.38, what is the H₃O⁺ concentration in the orange juice?

Select the two Brønsted-Lowry acids in the following equation: HNO₂(aq)+ H₂O(l)⇌ NO₂⁻(aq)+ H₃O⁺(aq)

The conjugate acid of H₂PO₄⁻ is:

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

The conjugate acid of HCO₃⁻ is:

Rank the following 0.100 M solutions in order of increasing H₃O⁺ concentration: HF, K_a = 6.3 × 10⁻⁴; HCN, K_a = 6.2 × 10⁻¹⁰; HOCl, K_a = 4.0 × 10⁻⁸

Calculate the pH of a solution that has [OH^-] = 5.2 × 10^-7 M.

Select the two Brønsted-Lowry acids in the following equation: CO₃^2-(aq)+ HF(aq)⇌ HCO₃^-(aq)+ F^-(aq)

List the species present in order of increasing concentration in a 0.1 M solution of H₂Se.

If the pH of a certain soft drink is 3.60, what is the H₃O⁺ concentration in the soft drink?