Question 1

Which of the following would form a basic solution when added to water?

Accepted Answer

A) CO2 (g) 
B) Na2O (s) 
C) SO3 (g) 
D) H2O (g) 
E) P4O6 (g) 
A) CO2 (g) 
B) Na2O (s) 
C) SO3 (g) 
D) H2O (g) 
E) P4O6 (g)

Question 2

For the reaction, CO2 + H2O   H2CO3, which of the following statements is incorrect?

Accepted Answer

A) CO2 is a Brønsted-Lowry acid and H2O is a Brønsted-Lowry base. 
B) H2CO3 forms a coordinate covalent bond by a Lewis acid-base reaction. 
C) CO2 is a Lewis acid and H2O is a Lewis base. 
D) The lone pairs in the H2O molecule are used to form a new bond with the carbon in the CO2 molecule. 
E) Both A and D 
A) CO2 is a Brønsted-Lowry acid and H2O is a Brønsted-Lowry base. 
B) H2CO3 forms a coordinate covalent bond by a Lewis acid-base reaction. 
C) CO2 is a Lewis acid and H2O is a Lewis base. 
D) The lone pairs in the H2O molecule are used to form a new bond with the carbon in the CO2 molecule. 
E) Both A and D

Question 3

Which species is amphiprotic?

Accepted Answer

A) PO43-(aq) 
B) HCl(g) 
C) HSO4-(aq) 
D) Cl-(aq) 
E) CO32-(aq) 
A) PO43-(aq) 
B) HCl(g) 
C) HSO4-(aq) 
D) Cl-(aq) 
E) CO32-(aq)

Question 4

What is the formula for the conjugate base of the HCO3-(aq)ion?

Accepted Answer

Question 5

All oxides are acidic when added to water.

Accepted Answer

A) True 
 B)False

Question 6

The conjugate acid of Cl-(aq)is HCl(aq).

Accepted Answer

A) True 
 B)False

Question 7

What is the formula for the conjugate base of HNO3(aq)?

Accepted Answer

Question 8

Five solutions were prepared by dissolving 0.00100 mole of each of the following in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution?

Accepted Answer

A) Na2O 
B) BaO 
C) Ga2O3 
D) Al2O3 
E) P4O6 
A) Na2O 
B) BaO 
C) Ga2O3 
D) Al2O3 
E) P4O6

Question 9

What is the difference between a xerogel and aerogel solid made using the sol-gel process?

Accepted Answer

Xerogels are formed by the evaporation o

Question 10

Explain how NH3 can be both a Brønsted-Lowry base and a Lewis base, at the same time.

Accepted Answer

When NH₃accepts a proton and becomesNH₄⁺it

Question 11

Which species is amphiprotic?

Accepted Answer

A) AsO43-(aq) 
B) HBr(aq) 
C) HF(aq) 
D) SO42-(aq) 
E) HCO3-(aq) 
A) AsO43-(aq) 
B) HBr(aq) 
C) HF(aq) 
D) SO42-(aq) 
E) HCO3-(aq)

Question 12

SO2 can react with OH-, forming HSO3-. In this reaction,

Accepted Answer

A) the SO2 is a Brønsted-Lowry acid, accepting a proton from the OH- ion. 
B) the SO2 is a Lewis acid, accepting a proton from the OH- ion. 
C) the OH- ion is a Brønsted-Lowry base, donating a proton to the SO2 molecule. 
D) the OH- ion is a Lewis base, donating an electron pair to the SO2 molecule to form a coordinate covalent bond. 
E) the OH- ion is a Lewis acid, accepting an electron pair from the SO2 molecule to form a coordinate covalent bond. 
A) the SO2 is a Brønsted-Lowry acid, accepting a proton from the OH- ion. 
B) the SO2 is a Lewis acid, accepting a proton from the OH- ion. 
C) the OH- ion is a Brønsted-Lowry base, donating a proton to the SO2 molecule. 
D) the OH- ion is a Lewis base, donating an electron pair to the SO2 molecule to form a coordinate covalent bond. 
E) the OH- ion is a Lewis acid, accepting an electron pair from the SO2 molecule to form a coordinate covalent bond.

Question 13

For the system HC6H5O + C4H7O2-   C6H5O- + HC4H7O2 the position of the equilibrium lies to the left. Which is the strongest base in the system?

Accepted Answer

A) HC6H5O 
B) C4H7O2- 
C) C6H5O- 
D) HC4H7O2 
E) HC4H7O2 and C4H7O2- are equal in acid strength, and are the strongest acids in the system 
A) HC6H5O 
B) C4H7O2- 
C) C6H5O- 
D) HC4H7O2 
E) HC4H7O2 and C4H7O2- are equal in acid strength, and are the strongest acids in the system

Question 14

Which of the following would form an acidic solution when added to water?

Accepted Answer

A) CO2 (g) 
B) Na2O (s) 
C) CaO (s) 
D) H2O (g) 
E) None of these 
A) CO2 (g) 
B) Na2O (s) 
C) CaO (s) 
D) H2O (g) 
E) None of these

Question 15

For the system NH2OH(aq)+ CH3NH3+(aq)   CH3NH2(aq)+ NH3OH+(aq)the position of equilibrium lies to the left. What is the strongest base in this reaction?

Accepted Answer

Question 16

The H2PO4-(aq)ion is amphiprotic in water solution.

Accepted Answer

A) True 
 B)False

Question 17

Five solutions were prepared by dissolving 0.00100 mole of each of the following compounds in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution?

Accepted Answer

A) CO2 
B) P4O6 
C) P4O10 
D) SO2 
E) SO3 
A) CO2 
B) P4O6 
C) P4O10 
D) SO2 
E) SO3

Question 18

Selenium atoms can react with the sulfite ion to produce a selenosulfate ion, as shown below.   Which reactant is functioning as the Lewis base?

Accepted Answer

The answer of Selenium atoms can react with the sulfite...

Question 19

Given the following substances, listed in order of increasing acid strength,HOCl(aq)2H3O2(aq)2O4-(aq)2(aq)< HCl(aq)Which species listed below is the weakest base?

Accepted Answer

A) C2H3O2-(aq) 
B) OCl-(aq) 
C) H2C2O4(aq) 
D) Cl-(aq) 
E) OCN-(aq) 
A) C2H3O2-(aq) 
B) OCl-(aq) 
C) H2C2O4(aq) 
D) Cl-(aq) 
E) OCN-(aq)

Question 20

Which species does not have a conjugate acid?

Accepted Answer

A) HCO2 
B) H2O 
C) HCl 
D) OH- 
E) NH2- 
A) HCO2 
B) H2O 
C) HCl 
D) OH- 
E) NH2-

Exam 16: Acids and Bases, a Molecular Look

Which of the following would form a basic solution when added to water?

For the reaction, CO2 + H2O H2CO3, which of the following statements is incorrect?

Which species is amphiprotic?

What is the formula for the conjugate base of the HCO3-(aq)ion?

All oxides are acidic when added to water.

The conjugate acid of Cl-(aq)is HCl(aq).

What is the formula for the conjugate base of HNO3(aq)?

Five solutions were prepared by dissolving 0.00100 mole of each of the following in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution?

What is the difference between a xerogel and aerogel solid made using the sol-gel process?

Explain how NH3 can be both a Brønsted-Lowry base and a Lewis base, at the same time.

Which species is amphiprotic?

SO2 can react with OH-, forming HSO3-. In this reaction,

For the system HC6H5O + C4H7O2- C6H5O- + HC4H7O2 the position of the equilibrium lies to the left. Which is the strongest base in the system?

Which of the following would form an acidic solution when added to water?

For the system NH2OH(aq)+ CH3NH3+(aq) CH3NH2(aq)+ NH3OH+(aq)the position of equilibrium lies to the left. What is the strongest base in this reaction?

The H2PO4-(aq)ion is amphiprotic in water solution.

Five solutions were prepared by dissolving 0.00100 mole of each of the following compounds in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution?

Selenium atoms can react with the sulfite ion to produce a selenosulfate ion, as shown below. Which reactant is functioning as the Lewis base?

Given the following substances, listed in order of increasing acid strength,HOCl(aq)< HC2H3O2(aq)< HC2O4-(aq)< HOCN(aq)< HNO2(aq)< HCl(aq)Which species listed below is the weakest base?

Which species does not have a conjugate acid?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

For the reaction, CO₂ + H₂O H₂CO₃, which of the following statements is incorrect?

What is the formula for the conjugate base of the HCO₃^-(aq)ion?

The conjugate acid of Cl^-(aq)is HCl(aq).

What is the formula for the conjugate base of HNO₃(aq)?

Explain how NH₃ can be both a Brønsted-Lowry base and a Lewis base, at the same time.

SO₂ can react with OH^-, forming HSO₃^-. In this reaction,

For the system HC₆H₅O + C₄H₇O₂^- C₆H₅O^- + HC₄H₇O₂ the position of the equilibrium lies to the left. Which is the strongest base in the system?

For the system NH₂OH(aq)+ CH₃NH₃⁺(aq) CH₃NH₂(aq)+ NH₃OH⁺(aq)the position of equilibrium lies to the left. What is the strongest base in this reaction?

The H₂PO₄^-(aq)ion is amphiprotic in water solution.

Given the following substances, listed in order of increasing acid strength,HOCl(aq)< HC₂H₃O₂(aq)< HC₂O₄^-(aq)< HOCN(aq)< HNO₂(aq)< HCl(aq)Which species listed below is the weakest base?