Question 1

A solution in which [-OH] = 6.3 × 10-7 M has a higher pH than a solution with a [-OH] = 4.3 × 10-2 M.

Accepted Answer

A) True 
 B)False  False

Question 2

All compounds can be classified as either an acid or a base.

Accepted Answer

A) True 
 B)False  False

Question 3

Which compound is a weak acid?

Accepted Answer

A) HNO3 
B) HBr 
C) CH3COOH 
D) H2SO4 
A) HNO3 
B) HBr 
C) CH3COOH 
D) H2SO4 C

Question 4

Consider two acids,A and B. If acid A is weaker than acid B,then acid B dissociates in water to a greater extent than acid A.

Accepted Answer

A) True 
 B)False

Question 5

What is the pH of a cleaning solution with a [H3O+] = 7.4 × 10-9 M H3O+?

Accepted Answer

A) 5.9 
B) 7.13 
C) 8.13 
D) 5.87 
A) 5.9 
B) 7.13 
C) 8.13 
D) 5.87

Question 6

A solution in which [H3O+] = 7.4 × 10-5 M has a higher pH than a solution with a [-OH] = 4.8 × 10-8 M.

Accepted Answer

A) True 
 B)False

Question 7

In the acid-base reaction: F-(aq)+ HNO3(aq)   HF(aq)+ NO3-(aq)________.

Accepted Answer

A) F- is the acid and its conjugate base is HF,and HNO3 is the base and its conjugate acid is NO3-(aq) 
B) HNO3 is the acid and its conjugate base is NO3-(aq),and F- is the base and its conjugate acid is HF 
C) F- is the acid and its conjugate base is NO3-(aq),and HNO3 is the base and its conjugate acid is HF 
D) HNO3 is the acid and its conjugate base is HF,and F- is the base and its conjugate acid is NO3-(aq) 
A) F- is the acid and its conjugate base is HF,and HNO3 is the base and its conjugate acid is NO3-(aq) 
B) HNO3 is the acid and its conjugate base is NO3-(aq),and F- is the base and its conjugate acid is HF 
C) F- is the acid and its conjugate base is NO3-(aq),and HNO3 is the base and its conjugate acid is HF 
D) HNO3 is the acid and its conjugate base is HF,and F- is the base and its conjugate acid is NO3-(aq)

Question 8

The value of Kw applies to any aqueous solution at 25 °C ,not just pure water.

Accepted Answer

A) True 
 B)False

Question 9

Two species that differ by the presence of a proton are called a conjugate acid-base pair.

Accepted Answer

A) True 
 B)False

Question 10

A solution containing a low concentration HCl is a weak acid.

Accepted Answer

A) True 
 B)False

Question 11

Ammonia,NH3,is an example of a ________.

Accepted Answer

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

Question 12

HOBr and CH3CH2CH2COOH are both examples of Brønsted-Lowry acids.

Accepted Answer

A) True 
 B)False

Question 13

Which species can act as an Arrhenius base?

Accepted Answer

A) CO32- 
B) HNO3 
C) LiOH 
D) NH3 
A) CO32- 
B) HNO3 
C) LiOH 
D) NH3

Question 14

In a reversible acid-base reaction,equilibrium favors the formation of the acid with the smaller Ka value.

Accepted Answer

A) True 
 B)False

Question 15

Although a Brønsted-Lowry acid must contain a hydrogen atom,it may be a neutral molecule or contain a net positive or negative charge.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is the hydronium ion?

Accepted Answer

A) H2O 
B) H3O+ 
C) OH- 
D) H+ 
A) H2O 
B) H3O+ 
C) OH- 
D) H+

Question 17

The reactants are favored in the acid-base reaction: HF(aq)+ -OH(aq)   F-(aq)+ H2O(l).

Accepted Answer

A) True 
 B)False

Question 18

The [H3O+] in a cabernet sauvignon wine is 5.9 × 10-4 M. What is the [-OH] in this wine?

Accepted Answer

A) 5.9 × 10-4 M -OH 
B) 1.0 × 10-7 M -OH 
C) 5.9 × 10-18 M -OH 
D) 1.7 × 10-11 M -OH 
E) 1.0 × 10-14 M -OH 
A) 5.9 × 10-4 M -OH 
B) 1.0 × 10-7 M -OH 
C) 5.9 × 10-18 M -OH 
D) 1.7 × 10-11 M -OH 
E) 1.0 × 10-14 M -OH

Question 19

A Brønsted-Lowry base is ________.

Accepted Answer

A) a compound that contains hydroxide and dissolves in water to form OH- 
B) a compound that is a proton donor 
C) a compound that is a proton acceptor 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion,H+ 
A) a compound that contains hydroxide and dissolves in water to form OH- 
B) a compound that is a proton donor 
C) a compound that is a proton acceptor 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion,H+

Question 20

What is the pH of a peach with a [-OH] = 3.2 × 10-11 M?

Accepted Answer

A) 11.32 
B) 10.49 
C) 3.51 
D) 3.2 
A) 11.32 
B) 10.49 
C) 3.51 
D) 3.2

Exam 9: Acids and Bases

A solution in which [-OH] = 6.3 × 10-7 M has a higher pH than a solution with a [-OH] = 4.3 × 10-2 M.

All compounds can be classified as either an acid or a base.

Which compound is a weak acid?

Consider two acids,A and B. If acid A is weaker than acid B,then acid B dissociates in water to a greater extent than acid A.

What is the pH of a cleaning solution with a [H3O+] = 7.4 × 10-9 M H3O+?

A solution in which [H3O+] = 7.4 × 10-5 M has a higher pH than a solution with a [-OH] = 4.8 × 10-8 M.

In the acid-base reaction: F-(aq)+ HNO3(aq) HF(aq)+ NO3-(aq)________.

The value of Kw applies to any aqueous solution at 25 °C ,not just pure water.

Two species that differ by the presence of a proton are called a conjugate acid-base pair.

A solution containing a low concentration HCl is a weak acid.

Ammonia,NH3,is an example of a ________.

HOBr and CH3CH2CH2COOH are both examples of Brønsted-Lowry acids.

Which species can act as an Arrhenius base?

In a reversible acid-base reaction,equilibrium favors the formation of the acid with the smaller Ka value.

Although a Brønsted-Lowry acid must contain a hydrogen atom,it may be a neutral molecule or contain a net positive or negative charge.

Which of the following is the hydronium ion?

The reactants are favored in the acid-base reaction: HF(aq)+ -OH(aq) F-(aq)+ H2O(l).

The [H3O+] in a cabernet sauvignon wine is 5.9 × 10-4 M. What is the [-OH] in this wine?

A Brønsted-Lowry base is ________.

What is the pH of a peach with a [-OH] = 3.2 × 10-11 M?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

A solution in which [^-OH] = 6.3 × 10^-7 M has a higher pH than a solution with a [^-OH] = 4.3 × 10^-2 M.

What is the pH of a cleaning solution with a [H₃O⁺] = 7.4 × 10^-9 M H₃O⁺?

A solution in which [H₃O⁺] = 7.4 × 10^-5 M has a higher pH than a solution with a [^-OH] = 4.8 × 10^-8 M.

In the acid-base reaction: F^-(aq)+ HNO₃(aq) HF(aq)+ NO₃^-(aq)________.

The value of K_w applies to any aqueous solution at 25 °C ,not just pure water.

Ammonia,NH₃,is an example of a ________.

HOBr and CH₃CH₂CH₂COOH are both examples of Brønsted-Lowry acids.

In a reversible acid-base reaction,equilibrium favors the formation of the acid with the smaller K_a value.

The reactants are favored in the acid-base reaction: HF(aq)+ ^-OH(aq) F^-(aq)+ H₂O(l).

The [H₃O⁺] in a cabernet sauvignon wine is 5.9 × 10^-4 M. What is the [^-OH] in this wine?

What is the pH of a peach with a [^-OH] = 3.2 × 10^-11 M?