Question 1

Select the two Brønsted-Lowry acids in the following equation: NH3(aq) + HF(aq) ⇌ NH4+(aq) + F-(aq)

Accepted Answer

A) NH3 and HF 
B) NH3 and F-  
C) HF and F-  
D) NH4+ and F-  
E) HF and NH4+  
A) NH3 and HF 
B) NH3 and F-  
C) HF and F-  
D) NH4+ and F-  
E) HF and NH4+

Question 2

Select the solution below that is the most acidic.

Accepted Answer

A) [OH-] = 1.0 x 10-10 M 
B) [OH-] = 1.0 x 10-5 M 
C) [H3O+] = 1.0 x 10-6 M 
D) [H3O+] = 1.0 x 10-7 M 
E) [H3O+] = 1.0 x 10-9 M 
A) [OH-] = 1.0 x 10-10 M 
B) [OH-] = 1.0 x 10-5 M 
C) [H3O+] = 1.0 x 10-6 M 
D) [H3O+] = 1.0 x 10-7 M 
E) [H3O+] = 1.0 x 10-9 M

Question 3

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 4

Which of the following equations represents the behavior of HCO3- as a base?

Accepted Answer

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

Question 5

Select the two Brønsted-Lowry bases in the following equation: CH3NH2(aq) + H2O(l) ⇌ CH3NH3+(aq) + OH-(aq)

Accepted Answer

A) CH3NH2 and H2O 
B) CH3NH2 and OH-  
C) H2O and OH-  
D) CH3NH2 and CH3NH3+  
E) CH3NH3+ and OH-  
A) CH3NH2 and H2O 
B) CH3NH2 and OH-  
C) H2O and OH-  
D) CH3NH2 and CH3NH3+  
E) CH3NH3+ and OH-

Question 6

A solution of a strong acid will have a greater H3O+ concentration than a solution of a weak acid under any circumstances.

Accepted Answer

A) True 
 B)False

Question 7

The indicator phenol red changes from yellow to red between pH 6.8 and pH 8.4.If phenol red is added to a solution, and the solution turns yellow, then

Accepted Answer

A) the solution is basic, and the pH must be at or below 7.0. 
B) the pH of the solution must be below 6.8, and the solution is basic. 
C) the pH of the solution must be below 6.8, and the solution is acidic. 
D) the pH of the solution must be above 8.4, and the solution is basic. 
E) the pH of the solution is above 8.4, and the solution is acidic. 
A) the solution is basic, and the pH must be at or below 7.0. 
B) the pH of the solution must be below 6.8, and the solution is basic. 
C) the pH of the solution must be below 6.8, and the solution is acidic. 
D) the pH of the solution must be above 8.4, and the solution is basic. 
E) the pH of the solution is above 8.4, and the solution is acidic.

Question 8

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

Question 9

Which of the following ionizes to the greatest extent?

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 10

If the pOH of a coffee sample is 8.85, what is the H3O+ concentration in the coffee?

Accepted Answer

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

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

Select the solution below that is the most basic.

Accepted Answer

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

Question 13

Select the strong acid from the following list.

Accepted Answer

A) H3PO4(aq) 
B) CH3CO2H(aq) 
C) H2S(aq) 
D) H2SO4(aq) 
E) HF(aq) 
A) H3PO4(aq) 
B) CH3CO2H(aq) 
C) H2S(aq) 
D) H2SO4(aq) 
E) HF(aq)

Question 14

Which of the following is the strongest acid?

Accepted Answer

A) HOCl, Ka = 4.0 x 10-8  
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) HOCl, Ka = 4.0 x 10-8  
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 15

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 16

What is the pH of a 0.020 M KOH 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 17

The pH of an aqueous HCl solution can be greater than 7.

Accepted Answer

A) True 
 B)False

Question 18

When ammonia, NH3, is dissolved in water, which ions are formed?

Accepted Answer

A) NH3-(aq) and OH-(aq) 
B) NH3+(aq) and OH-(aq) 
C) NH4+(aq) and OH-(aq) 
D) NH4+(aq) and H-(aq) 
E) NH2-(aq) and H+(aq) 
A) NH3-(aq) and OH-(aq) 
B) NH3+(aq) and OH-(aq) 
C) NH4+(aq) and OH-(aq) 
D) NH4+(aq) and H-(aq) 
E) NH2-(aq) and H+(aq)

Question 19

Polyprotic acids possess more than one ionizable hydrogen atom.

Accepted Answer

A) True 
 B)False

Question 20

The Ka for formic acid is 1.8 ´ 10-4.Which of the following statements best describes the pH of a 0.0010 M solution of formic acid?

Accepted Answer

A) The pH is greater than 0 but less than 3. 
B) The pH is exactly 3. 
C) The pH is greater than 3 but less than 7. 
D) The pH is exactly 7. 
E) The pH is greater than 7 but less than 11. 
A) The pH is greater than 0 but less than 3. 
B) The pH is exactly 3. 
C) The pH is greater than 3 but less than 7. 
D) The pH is exactly 7. 
E) The pH is greater than 7 but less than 11.

Select the two Brønsted-Lowry acids in the following equation: NH₃(aq) + HF(aq) ⇌ NH₄⁺(aq) + F^-(aq)

Select the solution below that is the most acidic.

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

Which of the following equations represents the behavior of HCO₃^- as a base?

Select the two Brønsted-Lowry bases in the following equation: CH₃NH₂(aq) + H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH^-(aq)

A solution of a strong acid will have a greater H₃O⁺ concentration than a solution of a weak acid under any circumstances.

The indicator phenol red changes from yellow to red between pH 6.8 and pH 8.4.If phenol red is added to a solution, and the solution turns yellow, then

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

Which of the following ionizes to the greatest extent?

If the pOH of a coffee sample is 8.85, what is the H₃O⁺ concentration in the coffee?

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

Select the solution below that is the most basic.

Select the strong acid from the following list.

Which of the following is the strongest acid?

The substance Mg(OH)₂(aq) is:

What is the pH of a 0.020 M KOH solution?

The pH of an aqueous HCl solution can be greater than 7.

When ammonia, NH₃, is dissolved in water, which ions are formed?

Polyprotic acids possess more than one ionizable hydrogen atom.

The K_a for formic acid is 1.8 ´ 10^-4.Which of the following statements best describes the pH of a 0.0010 M solution of formic 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

Select the two Brønsted-Lowry acids in the following equation: NH3(aq) + HF(aq) ⇌ NH4+(aq) + F-(aq)

Select the solution below that is the most acidic.

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

Which of the following equations represents the behavior of HCO3- as a base?

Select the two Brønsted-Lowry bases in the following equation: CH3NH2(aq) + H2O(l) ⇌ CH3NH3+(aq) + OH-(aq)

A solution of a strong acid will have a greater H3O+ concentration than a solution of a weak acid under any circumstances.

The indicator phenol red changes from yellow to red between pH 6.8 and pH 8.4.If phenol red is added to a solution, and the solution turns yellow, then

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

Which of the following ionizes to the greatest extent?

If the pOH of a coffee sample is 8.85, what is the H3O+ concentration in the coffee?

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

Select the solution below that is the most basic.

Select the strong acid from the following list.

Which of the following is the strongest acid?

The substance Mg(OH)2(aq) is:

What is the pH of a 0.020 M KOH solution?

The pH of an aqueous HCl solution can be greater than 7.

When ammonia, NH3, is dissolved in water, which ions are formed?

Polyprotic acids possess more than one ionizable hydrogen atom.

The Ka for formic acid is 1.8 ´ 10-4.Which of the following statements best describes the pH of a 0.0010 M solution of formic 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

Select the two Brønsted-Lowry acids in the following equation: NH₃(aq) + HF(aq) ⇌ NH₄⁺(aq) + F^-(aq)

Which of the following equations represents the behavior of HCO₃^- as a base?

Select the two Brønsted-Lowry bases in the following equation: CH₃NH₂(aq) + H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH^-(aq)

A solution of a strong acid will have a greater H₃O⁺ concentration than a solution of a weak acid under any circumstances.

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

If the pOH of a coffee sample is 8.85, what is the H₃O⁺ concentration in the coffee?

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

The substance Mg(OH)₂(aq) is:

When ammonia, NH₃, is dissolved in water, which ions are formed?

The K_a for formic acid is 1.8 ´ 10^-4.Which of the following statements best describes the pH of a 0.0010 M solution of formic acid?