Question 1

A solution of AuCl3(aq)is electrolyzed by passing 85.0 A of current for 17.6 min.What mass of gold plates out?

Accepted Answer

A) 61.1 g 
B) 1.02 g 
C) 183 g 
D) 0.483 g 
E) 290 g 
A) 61.1 g 
B) 1.02 g 
C) 183 g 
D) 0.483 g 
E) 290 g

Question 2

For the reaction: Mg(s)+ AgNO3(aq)→ Ag(s)+ Mg(NO3)2(aq)
Ag+(aq)+ e- → Ag(s)E° = 0.800 V
Mg2+(aq)+ 2 e- → Mg(s)E° = -2.356 V
Determine ΔG°.

Accepted Answer

A) -300.3 kJ/mol 
B) 304.5 kJ/mol 
C) 609.0 kJ/mol 
D) -304.5 kJ/mol 
E) -609.0 kJ/mol 
A) -300.3 kJ/mol 
B) 304.5 kJ/mol 
C) 609.0 kJ/mol 
D) -304.5 kJ/mol 
E) -609.0 kJ/mol

Question 3

What is the cell potential for the following cell at 25 °C?
Zn(s)∣ Zn2+ (0.0456 M)   Cu2+(0.120 M)∣ Cu(s)
Cu2+(aq)+ 2 e- → Cu(s)E° = 0.340 V
Zn2+(aq)+ 2 e- → Zn(s)E° = -0.763 V

Accepted Answer

A) 1.088 V 
B) 1.114 V 
C) 1.106 V 
D) 1.094 V 
E) 1.129 V 
A) 1.088 V 
B) 1.114 V 
C) 1.106 V 
D) 1.094 V 
E) 1.129 V

Question 4

For the reaction: Mg(s)+ AgNO3(aq)→ Ag(s)+ Mg(NO3)2(aq)
Ag+(aq)+ e- → Ag(s)E° = 0.800 V
Mg2+(aq)+ 2 e- → Mg(s)E° = -2.356 V
Estimate Keq at 25 °C.

Accepted Answer

A) 5.7 × 10106  
B) 2.0 × 1053  
C) 3.7 × 1052  
D) 1.1 × 1027  
E) 10-107  
A) 5.7 × 10106  
B) 2.0 × 1053  
C) 3.7 × 1052  
D) 1.1 × 1027  
E) 10-107

Question 5

Glass electrodes are used for direct measurement of:

Accepted Answer

A) pH 
B) pKa 
C) Ksp 
D) Q 
E) pKw 
A) pH 
B) pKa 
C) Ksp 
D) Q 
E) pKw

Question 6

What is the Ecell for the following cell at 25 °C?
Pt(s)∣ Fe2+ (aq,0.0562 M),Fe3+ (aq,0.253 M)   Ag+ (aq,0.334 M)∣ Ag(s)
Ag+(aq)+ e- → Ag(s)E° = 0.800 V
Fe3+(aq)+ e- → Fe2+ E° = -0.771 V

Accepted Answer

A) -0.038 V 
B) 1.500 V 
C) -0.004 V 
D) 0.096 V 
E) 0.039 V 
A) -0.038 V 
B) 1.500 V 
C) -0.004 V 
D) 0.096 V 
E) 0.039 V

Question 7

What is ES1U1B1cell S1U1B0at 25 °C of the spontaneous cell made from the ZnS1U1P12+(S1S1P0aq)/Zn(s)(0.76 V)and BrS1U1B12S1U1B0(l)/BrS1U1P1-S1S1P0(aq)(1.07 V)half cells if [ZnS1U1P12+S1S1P0] = 1 × 10S1U1P1-2S1S1P0 M and [BrS1U1P1-S1S1P0] = 1 × 10S1U1P1-4S1S1P0 M?

Accepted Answer

A) 0.40 V 
B) 0.13 V 
C) 0.61 V 
D) 0.01 V 
E) 0.49 V 
A) 0.40 V 
B) 0.13 V 
C) 0.61 V 
D) 0.01 V 
E) 0.49 V

A solution of AuCl₃(aq)is electrolyzed by passing 85.0 A of current for 17.6 min.What mass of gold plates out?

For the reaction: Mg(s)+ AgNO₃(aq)→ Ag(s)+ Mg(NO₃)₂(aq) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Mg²⁺(aq)+ 2 e^- → Mg(s)E° = -2.356 V Determine ΔG°.

What is the cell potential for the following cell at 25 °C? Zn(s)∣ Zn²⁺ (0.0456 M) Cu²⁺(0.120 M)∣ Cu(s) Cu²⁺(aq)+ 2 e^- → Cu(s)E° = 0.340 V Zn²⁺(aq)+ 2 e^- → Zn(s)E° = -0.763 V

For the reaction: Mg(s)+ AgNO₃(aq)→ Ag(s)+ Mg(NO₃)₂(aq) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Mg²⁺(aq)+ 2 e^- → Mg(s)E° = -2.356 V Estimate K_eq at 25 °C.

Glass electrodes are used for direct measurement of:

What is the E_cell for the following cell at 25 °C? Pt(s)∣ Fe²⁺ (aq,0.0562 M),Fe³⁺ (aq,0.253 M) Ag+ (aq,0.334 M)∣ Ag(s) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Fe³⁺(aq)+ e^- → Fe²⁺ E° = -0.771 V

What is E_cellat 25 °C of the spontaneous cell made from the Zn²⁺⁽aq)/Zn(s)(0.76 V)and Br₂(l)/Br^-(aq)(1.07 V)half cells if [Zn²⁺] = 1 × 10^-2 M and [Br^-] = 1 × 10^-4 M?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Exam 19: Electrochemistry

A solution of AuCl3(aq)is electrolyzed by passing 85.0 A of current for 17.6 min.What mass of gold plates out?

For the reaction: Mg(s)+ AgNO3(aq)→ Ag(s)+ Mg(NO3)2(aq) Ag+(aq)+ e- → Ag(s)E° = 0.800 V Mg2+(aq)+ 2 e- → Mg(s)E° = -2.356 V Determine ΔG°.

What is the cell potential for the following cell at 25 °C? Zn(s)∣ Zn2+ (0.0456 M) Cu2+(0.120 M)∣ Cu(s) Cu2+(aq)+ 2 e- → Cu(s)E° = 0.340 V Zn2+(aq)+ 2 e- → Zn(s)E° = -0.763 V

For the reaction: Mg(s)+ AgNO3(aq)→ Ag(s)+ Mg(NO3)2(aq) Ag+(aq)+ e- → Ag(s)E° = 0.800 V Mg2+(aq)+ 2 e- → Mg(s)E° = -2.356 V Estimate Keq at 25 °C.

Glass electrodes are used for direct measurement of:

What is the Ecell for the following cell at 25 °C? Pt(s)∣ Fe2+ (aq,0.0562 M),Fe3+ (aq,0.253 M) Ag+ (aq,0.334 M)∣ Ag(s) Ag+(aq)+ e- → Ag(s)E° = 0.800 V Fe3+(aq)+ e- → Fe2+ E° = -0.771 V

What is Ecell at 25 °C of the spontaneous cell made from the Zn2+(aq)/Zn(s)(0.76 V)and Br2(l)/Br-(aq)(1.07 V)half cells if [Zn2+] = 1 × 10-2 M and [Br-] = 1 × 10-4 M?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

A solution of AuCl₃(aq)is electrolyzed by passing 85.0 A of current for 17.6 min.What mass of gold plates out?

For the reaction: Mg(s)+ AgNO₃(aq)→ Ag(s)+ Mg(NO₃)₂(aq) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Mg²⁺(aq)+ 2 e^- → Mg(s)E° = -2.356 V Determine ΔG°.

What is the cell potential for the following cell at 25 °C? Zn(s)∣ Zn²⁺ (0.0456 M) Cu²⁺(0.120 M)∣ Cu(s) Cu²⁺(aq)+ 2 e^- → Cu(s)E° = 0.340 V Zn²⁺(aq)+ 2 e^- → Zn(s)E° = -0.763 V

For the reaction: Mg(s)+ AgNO₃(aq)→ Ag(s)+ Mg(NO₃)₂(aq) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Mg²⁺(aq)+ 2 e^- → Mg(s)E° = -2.356 V Estimate K_eq at 25 °C.

What is the E_cell for the following cell at 25 °C? Pt(s)∣ Fe²⁺ (aq,0.0562 M),Fe³⁺ (aq,0.253 M) Ag+ (aq,0.334 M)∣ Ag(s) Ag⁺(aq)+ e^- → Ag(s)E° = 0.800 V Fe³⁺(aq)+ e^- → Fe²⁺ E° = -0.771 V

What is E_cellat 25 °C of the spontaneous cell made from the Zn²⁺⁽aq)/Zn(s)(0.76 V)and Br₂(l)/Br^-(aq)(1.07 V)half cells if [Zn²⁺] = 1 × 10^-2 M and [Br^-] = 1 × 10^-4 M?