Question 1

HPO42- is amphoteric. The conjugate acid of HPO42- is ________ and its conjugate base is ________.

Accepted Answer

Question 2

A strong acid readily donates a proton,forming a (strong/weak)________ conjugate base.

Accepted Answer

The answer of A strong acid readily donates a proton,forming...

Question 3

What is the correct name of HNO2?

Accepted Answer

A) Nitrous acid 
B) Nitric acid 
C) Nitrate acid 
D) Nitrite acid 
A) Nitrous acid 
B) Nitric acid 
C) Nitrate acid 
D) Nitrite acid

Question 4

The acid-base indicator phenolphthalein is colorless in acidic solutions and bright pink in basic solutions.

Accepted Answer

A) True 
 B)False

Question 5

Which species is the conjugate base of HPO42-?

Accepted Answer

A) H2PO4- 
B) H3PO4 
C) H2O 
D) PO43- 
A) H2PO4- 
B) H3PO4 
C) H2O 
D) PO43-

Question 6

An Arrhenius acid is ________.

Accepted Answer

A) a compound that contains hydroxide and dissolves in water to form OH- 
B) a compound that is an electron 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 an electron 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 7

The pH of normal blood is 7.4. The pH of a diabetic's blood was determined to be 6.4. Which comparison of these two blood samples is accurate?

Accepted Answer

A) The diabetic's blood has a lower [H3O+] than normal blood. 
B) The diabetic's blood is more acidic than normal blood. 
C) Normal blood has a lower [OH-] than the diabetic's blood. 
D) Normal blood has a higher [H3O+] than the diabetic's blood. 
A) The diabetic's blood has a lower [H3O+] than normal blood. 
B) The diabetic's blood is more acidic than normal blood. 
C) Normal blood has a lower [OH-] than the diabetic's blood. 
D) Normal blood has a higher [H3O+] than the diabetic's blood.

Question 8

Ions that appear on both sides of an equation but undergo no change in a reaction are called ________ ions.

Accepted Answer

The answer of Ions that appear on both sides of...

Question 9

In the acid-base reaction: HCN(aq)+ F-(aq)   CN-(aq)+ HF(aq),where Ka (HCN)= 4.9 × 10-10 and Ka (HF)= 7.2 × 10-4,the ________.

Accepted Answer

A) products are favored 
B) reactants are favored 
A) products are favored 
B) reactants are favored

Question 10

The [H3O+] for a neutral solution is ________.

Accepted Answer

Question 11

In the following acid-base equation,the reactant ________ is behaving as the Brønsted-Lowry Base:
OH- + HF   F- + H2O

Accepted Answer

Question 12

Correctly identify the missing product in the following acid-base reaction: NH3 + HCl   NH4+ + ________

Accepted Answer

A) Cl- 
B) H2Cl+ 
C) Cl2 
D) OH- 
A) Cl- 
B) H2Cl+ 
C) Cl2 
D) OH-

Question 13

An aqueous solution of KCl has a lower pH than an aqueous solution of Li2SO3.

Accepted Answer

A) True 
 B)False

Question 14

Which pH value indicates the higher concentration of H3O+?

Accepted Answer

A) pH = 11.5 
B) pH = 12.9 
C) pH = 7.0 
D) pH = 5.2 
E) pH = 6.6 
A) pH = 11.5 
B) pH = 12.9 
C) pH = 7.0 
D) pH = 5.2 
E) pH = 6.6

Question 15

Which buffer solution has the lowest pH (HF has Ka = 7.2 × 10-4)?

Accepted Answer

A) 0.10 M HF and 0.10 M NaF 
B) 0.20 M HF and 0.20 M NaF 
C) 0.20 M HF and 0.10 M NaF 
D) 0.10 M HF and 0.20 M NaF 
E) All of the buffer solutions described have the same pH. 
A) 0.10 M HF and 0.10 M NaF 
B) 0.20 M HF and 0.20 M NaF 
C) 0.20 M HF and 0.10 M NaF 
D) 0.10 M HF and 0.20 M NaF 
E) All of the buffer solutions described have the same pH.

Question 16

Correctly identify the conjugate acid-base pairs in the following equation: HC2H3O2(l)+ H2O(l)   H3O+(aq)+ C2H3O2-(aq)

Accepted Answer

A) HC2H3O2/H2O and H2O/C2H3O2- 
B) HC2H3O2/H2O and H3O+/C2H3O2- 
C) HC2H3O2/ C2H3O2-and H2O/ H3O+ 
D) HC2H3O2/ H3O+ and H2O/C2H3O2- 
A) HC2H3O2/H2O and H2O/C2H3O2- 
B) HC2H3O2/H2O and H3O+/C2H3O2- 
C) HC2H3O2/ C2H3O2-and H2O/ H3O+ 
D) HC2H3O2/ H3O+ and H2O/C2H3O2-

Question 17

The [-OH] in a sample of egg whites is 6.3 × 10-7 M. What is the [H3O+] in these egg whites?

Accepted Answer

A) 6.3 × 10-7 M H3O+ 
B) 1.0 × 10-7 M H3O+ 
C) 6.3 × 10-21 M H3O+ 
D) 1.6 × 10-8 M H3O+ 
E) 1.0 × 10-14 M H3O+ 
A) 6.3 × 10-7 M H3O+ 
B) 1.0 × 10-7 M H3O+ 
C) 6.3 × 10-21 M H3O+ 
D) 1.6 × 10-8 M H3O+ 
E) 1.0 × 10-14 M H3O+

Question 18

The products are favored in the acid-base reaction: HI(aq)+ NH3(aq)   NH4+(aq)+ I-(aq).

Accepted Answer

A) True 
 B)False

Question 19

Which acid has the strongest conjugate base?

Accepted Answer

A) Hydrogen sulfate ion HSO4- (Ka = 1.2 × 10-2) 
B) Hydrocyanic acid HCN (Ka = 4.9 × 10-10) 
C) Hydrofluoric acid HF (Ka = 7.2 × 10-4) 
D) Ammonium ion NH4+ (Ka = 5.6 × 10-10) 
A) Hydrogen sulfate ion HSO4- (Ka = 1.2 × 10-2) 
B) Hydrocyanic acid HCN (Ka = 4.9 × 10-10) 
C) Hydrofluoric acid HF (Ka = 7.2 × 10-4) 
D) Ammonium ion NH4+ (Ka = 5.6 × 10-10)

Question 20

What is the conjugate base of the hydronium ion,H3O+?

Accepted Answer

A) OH- 
B) H2O- 
C) H2O 
D) H3O+ has no conjugate base. 
A) OH- 
B) H2O- 
C) H2O 
D) H3O+ has no conjugate base.

Exam 9: Acids and Bases

HPO42- is amphoteric. The conjugate acid of HPO42- is ________ and its conjugate base is ________.

A strong acid readily donates a proton,forming a (strong/weak)________ conjugate base.

What is the correct name of HNO2?

The acid-base indicator phenolphthalein is colorless in acidic solutions and bright pink in basic solutions.

Which species is the conjugate base of HPO42-?

An Arrhenius acid is ________.

The pH of normal blood is 7.4. The pH of a diabetic's blood was determined to be 6.4. Which comparison of these two blood samples is accurate?

Ions that appear on both sides of an equation but undergo no change in a reaction are called ________ ions.

In the acid-base reaction: HCN(aq)+ F-(aq) CN-(aq)+ HF(aq),where Ka (HCN)= 4.9 × 10-10 and Ka (HF)= 7.2 × 10-4,the ________.

The [H3O+] for a neutral solution is ________.

In the following acid-base equation,the reactant ________ is behaving as the Brønsted-Lowry Base: OH- + HF F- + H2O

Correctly identify the missing product in the following acid-base reaction: NH3 + HCl NH4+ + ________

An aqueous solution of KCl has a lower pH than an aqueous solution of Li2SO3.

Which pH value indicates the higher concentration of H3O+?

Which buffer solution has the lowest pH (HF has Ka = 7.2 × 10-4)?

Correctly identify the conjugate acid-base pairs in the following equation: HC2H3O2(l)+ H2O(l) H3O+(aq)+ C2H3O2-(aq)

The [-OH] in a sample of egg whites is 6.3 × 10-7 M. What is the [H3O+] in these egg whites?

The products are favored in the acid-base reaction: HI(aq)+ NH3(aq) NH4+(aq)+ I-(aq).

Which acid has the strongest conjugate base?

What is the conjugate base of the hydronium ion,H3O+?

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

HPO₄^2- is amphoteric. The conjugate acid of HPO₄^2- is and its conjugate base is .

What is the correct name of HNO₂?

Which species is the conjugate base of HPO₄^2-?

In the acid-base reaction: HCN(aq)+ F^-(aq) CN^-(aq)+ HF(aq),where K_a (HCN)= 4.9 × 10^-10 and K_a (HF)= 7.2 × 10^-4,the ________.

The [H₃O⁺] for a neutral solution is ________.

In the following acid-base equation,the reactant ________ is behaving as the Brønsted-Lowry Base: OH^- + HF F^- + H₂O

Correctly identify the missing product in the following acid-base reaction: NH₃ + HCl NH₄⁺ + ________

An aqueous solution of KCl has a lower pH than an aqueous solution of Li₂SO₃.

Which pH value indicates the higher concentration of H₃O⁺?

Which buffer solution has the lowest pH (HF has K_a = 7.2 × 10^-4)?

Correctly identify the conjugate acid-base pairs in the following equation: HC₂H₃O₂(l)+ H₂O(l) H₃O⁺(aq)+ C₂H₃O₂^-(aq)

The [^-OH] in a sample of egg whites is 6.3 × 10^-7 M. What is the [H₃O⁺] in these egg whites?

The products are favored in the acid-base reaction: HI(aq)+ NH₃(aq) NH₄⁺(aq)+ I^-(aq).

What is the conjugate base of the hydronium ion,H₃O⁺?