Question 1

The most difficult species to reduce and the poorest oxidizing agent is __________.

Accepted Answer

The answer of The most difficult species to reduce and...

Question 2

The lead-containing reactant(s)consumed during recharging of a lead-acid battery is/are __________.

Accepted Answer

A) Pb (s)only 
B) PbO2 (s)only 
C) PbSO4 (s)only 
D) both PbO2 (s)and PbSO4 (s) 
E) both Pb (s)and PbO2 (s) 
A) Pb (s)only 
B) PbO2 (s)only 
C) PbSO4 (s)only 
D) both PbO2 (s)and PbSO4 (s) 
E) both Pb (s)and PbO2 (s)

Question 3

The standard cell potential (E°)of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn (s)+ 2H+ (aq)→ Zn2+ (aq)+ H2 (g)
With PH2 = 1.0 atm and [Zn2+] = 1.0 M, the cell potential is 0.66 V. The concentration of H+ in the cathode compartment is __________ M.

Accepted Answer

A) 2.0 × 10-2 
B) 4.2 × 10-4 
C) 1.4 × 10-1 
D) 4.9 × 101 
E) 1.0 × 10-12 
A) 2.0 × 10-2 
B) 4.2 × 10-4 
C) 1.4 × 10-1 
D) 4.9 × 101 
E) 1.0 × 10-12

Question 4

What is the oxidation number of manganese in MnO2?

Accepted Answer

A) +3 
B) +2 
C) +1 
D) +4 
E) +7 
A) +3 
B) +2 
C) +1 
D) +4 
E) +7

Question 5

The standard cell potential (E°cell)of the reaction below is -0.55 V. The value of ΔG° for the reaction is __________ J/mol. I2 (s)+ 2Br- (aq)→ 2I- (aq)+ Br2 (l)

Accepted Answer

A) 0.54 
B) 0.55 
C) 5.5 × 10-6 
D) 1.1 × 105 
E) none of the above 
A) 0.54 
B) 0.55 
C) 5.5 × 10-6 
D) 1.1 × 105 
E) none of the above

Question 6

The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al2O3 × H2O. The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is __________ when the applied emf is 5.00 V.

Accepted Answer

A) 0.0168 
B) 0.0596 
C) 39.7 
D) 19.9 
E) 59.6 
A) 0.0168 
B) 0.0596 
C) 39.7 
D) 19.9 
E) 59.6

Question 7

A positive number for maximum useful work in a spontaneous process (voltaic cell)indicates that the cell will perform work on its surroundings.

Accepted Answer

A) True 
 B)False

Question 8

What is the oxidation number of oxygen in H2O2?

Accepted Answer

A) -1 
B) -2 
C) +1 
D) +2 
E) -1/2 
A) -1 
B) -2 
C) +1 
D) +2 
E) -1/2

Question 9

What is the cathode in the hydrogen fuel cell?

Accepted Answer

A) O2 
B) KOH 
C) Li 
D) H2 
E) Pt 
A) O2 
B) KOH 
C) Li 
D) H2 
E) Pt

Question 10

What current (in A)is required to plate out 1.22 g of nickel from a solution of Ni2+ in 2.5 hour?

Accepted Answer

A) 65.4 
B) 1.60 × 103 
C) 0.446 
D) 12.9 
E) 0.891 
A) 65.4 
B) 1.60 × 103 
C) 0.446 
D) 12.9 
E) 0.891

The most difficult species to reduce and the poorest oxidizing agent is __________.

The lead-containing reactant(s)consumed during recharging of a lead-acid battery is/are __________.

The standard cell potential (E°)of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn (s)+ 2H⁺ (aq)→ Zn²⁺ (aq)+ H₂ (g) With PH₂ = 1.0 atm and [Zn²⁺] = 1.0 M, the cell potential is 0.66 V. The concentration of H⁺ in the cathode compartment is __________ M.

What is the oxidation number of manganese in MnO₂?

The standard cell potential (E°_cell)of the reaction below is -0.55 V. The value of ΔG° for the reaction is __________ J/mol. I₂ (s)+ 2Br^- (aq)→ 2I^- (aq)+ Br₂ (l)

The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al₂O₃ × H₂O. The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is __________ when the applied emf is 5.00 V.

A positive number for maximum useful work in a spontaneous process (voltaic cell)indicates that the cell will perform work on its surroundings.

What is the oxidation number of oxygen in H₂O₂?

What is the cathode in the hydrogen fuel cell?

What current (in A)is required to plate out 1.22 g of nickel from a solution of Ni2+ in 2.5 hour?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

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Exam 20: Electrochemistry

The most difficult species to reduce and the poorest oxidizing agent is __________.

The lead-containing reactant(s)consumed during recharging of a lead-acid battery is/are __________.

The standard cell potential (E°)of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn (s)+ 2H+ (aq)→ Zn2+ (aq)+ H2 (g) With PH2 = 1.0 atm and [Zn2+] = 1.0 M, the cell potential is 0.66 V. The concentration of H+ in the cathode compartment is __________ M.

What is the oxidation number of manganese in MnO2?

The standard cell potential (E°cell)of the reaction below is -0.55 V. The value of ΔG° for the reaction is __________ J/mol. I2 (s)+ 2Br- (aq)→ 2I- (aq)+ Br2 (l)

The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al2O3 × H2O. The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is __________ when the applied emf is 5.00 V.

A positive number for maximum useful work in a spontaneous process (voltaic cell)indicates that the cell will perform work on its surroundings.

What is the oxidation number of oxygen in H2O2?

What is the cathode in the hydrogen fuel cell?

What current (in A)is required to plate out 1.22 g of nickel from a solution of Ni2+ in 2.5 hour?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The standard cell potential (E°)of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn (s)+ 2H⁺ (aq)→ Zn²⁺ (aq)+ H₂ (g) With PH₂ = 1.0 atm and [Zn²⁺] = 1.0 M, the cell potential is 0.66 V. The concentration of H⁺ in the cathode compartment is __________ M.

What is the oxidation number of manganese in MnO₂?

The standard cell potential (E°_cell)of the reaction below is -0.55 V. The value of ΔG° for the reaction is __________ J/mol. I₂ (s)+ 2Br^- (aq)→ 2I^- (aq)+ Br₂ (l)

The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al₂O₃ × H₂O. The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is __________ when the applied emf is 5.00 V.

What is the oxidation number of oxygen in H₂O₂?