Question 1

What is the oxidation number of potassium in KMnO4?

Accepted Answer

A) 0 
B) +1 
C) +2 
D) -1 
E) +3 
A) 0 
B) +1 
C) +2 
D) -1 
E) +3

Question 2

Which element is reduced in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g)

Accepted Answer

A) Fe 
B) C 
C) O 
D) H 
E) I 
A) Fe 
B) C 
C) O 
D) H 
E) I

Question 3

The dependence of cell emf on concentration is expressed in the ________ equation.

Accepted Answer

The answer of The dependence of cell emf on concentration...

Question 4

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 19.5 amps in an electrolyte cell?

Accepted Answer

A) 10.4 
B) 625 
C) 208 
D) 3.47 
E) 31.2 
A) 10.4 
B) 625 
C) 208 
D) 3.47 
E) 31.2

Question 5

What is the oxidation number of manganese in the MnO41- ion?

Accepted Answer

A) +1 
B) +2 
C) +5 
D) +4 
E) +7 
A) +1 
B) +2 
C) +5 
D) +4 
E) +7

Question 6

In the formula ΔG = -nFE, F is the ________.

Accepted Answer

Faraday constant or

Question 7

The standard cell potential (E°cell)of the reaction below is -0.34 V. The value of ΔG° for the reaction is ________ kJ/mol. Cu (s) + 2H+ (aq) → Cu2+ (aq) + H2 (g)

Accepted Answer

A) -0.34 
B) +66 
C) -130 
D) +130 
E) none of the above 
A) -0.34 
B) +66 
C) -130 
D) +130 
E) none of the above

Question 8

Which element is reduced in the reaction below? Fe2+ + H+ + Cr2O72- → Fe3+ + Cr3+ + H2O

Accepted Answer

A) Cr 
B) Fe 
C) H 
D) O 
A) Cr 
B) Fe 
C) H 
D) O

Question 9

What current (inA)is required to plate out 1.22 g of nickel from a solution of Ni2+ in 0.50 hour?

Accepted Answer

A) 65.4 
B) 8.02 × 103 
C) 2.22 
D) 12.9 
A) 65.4 
B) 8.02 × 103 
C) 2.22 
D) 12.9

Question 10

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 11

The electrode at which oxidation occurs is called the ________.

Accepted Answer

A) oxidizing agent 
B) cathode 
C) reducing agent 
D) anode 
E) voltaic cell 
A) oxidizing agent 
B) cathode 
C) reducing agent 
D) anode 
E) voltaic cell

Question 12

The lithium ion battery has more energy per unit mass than nickel-cadmium batteries.

Accepted Answer

A) True 
 B)False

Question 13

Which substance is the oxidizing agent in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g)

Accepted Answer

A) HI 
B) Fe(CO)5  
C) Fe(CO)4I2 
D) CO 
E) H2 
A) HI 
B) Fe(CO)5  
C) Fe(CO)4I2 
D) CO 
E) H2

Question 14

What is the oxidation number of bromine in the HBrO molecule?

Accepted Answer

A) +1 
B) +2 
C) 0 
D) -1 
E) -2 
A) +1 
B) +2 
C) 0 
D) -1 
E) -2

What is the oxidation number of potassium in KMnO₄?

Which element is reduced in the reaction below? Fe(CO)₅ (l) + 2HI (g) → Fe(CO)₄I₂ (s) + CO (g) + H₂ (g)

The dependence of cell emf on concentration is expressed in the ________ equation.

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr³⁺ using a current of 19.5 amps in an electrolyte cell?

What is the oxidation number of manganese in the MnO₄^1- ion?

In the formula ΔG = -nFE, F is the ________.

The standard cell potential (E°_cell)of the reaction below is -0.34 V. The value of ΔG° for the reaction is ________ kJ/mol. Cu (s) + 2H⁺ (aq) → Cu²⁺ (aq) + H₂ (g)

Which element is reduced in the reaction below? Fe²⁺ + H⁺ + Cr₂O₇^2- → Fe³⁺ + Cr³⁺ + H₂O

What current (inA)is required to plate out 1.22 g of nickel from a solution of Ni²⁺ in 0.50 hour?

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

The electrode at which oxidation occurs is called the ________.

The lithium ion battery has more energy per unit mass than nickel-cadmium batteries.

Which substance is the oxidizing agent in the reaction below? Fe(CO)₅ (l) + 2HI (g) → Fe(CO)₄I₂ (s) + CO (g) + H₂ (g)

What is the oxidation number of bromine in the HBrO molecule?

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

What is the oxidation number of potassium in KMnO4?

Which element is reduced in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g)

The dependence of cell emf on concentration is expressed in the ________ equation.

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 19.5 amps in an electrolyte cell?

What is the oxidation number of manganese in the MnO41- ion?

In the formula ΔG = -nFE, F is the ________.

The standard cell potential (E°cell)of the reaction below is -0.34 V. The value of ΔG° for the reaction is ________ kJ/mol. Cu (s) + 2H+ (aq) → Cu2+ (aq) + H2 (g)

Which element is reduced in the reaction below? Fe2+ + H+ + Cr2O72- → Fe3+ + Cr3+ + H2O

What current (inA)is required to plate out 1.22 g of nickel from a solution of Ni2+ in 0.50 hour?

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

The electrode at which oxidation occurs is called the ________.

The lithium ion battery has more energy per unit mass than nickel-cadmium batteries.

Which substance is the oxidizing agent in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g)

What is the oxidation number of bromine in the HBrO molecule?

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

What is the oxidation number of potassium in KMnO₄?

Which element is reduced in the reaction below? Fe(CO)₅ (l) + 2HI (g) → Fe(CO)₄I₂ (s) + CO (g) + H₂ (g)

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr³⁺ using a current of 19.5 amps in an electrolyte cell?

What is the oxidation number of manganese in the MnO₄^1- ion?

The standard cell potential (E°_cell)of the reaction below is -0.34 V. The value of ΔG° for the reaction is ________ kJ/mol. Cu (s) + 2H⁺ (aq) → Cu²⁺ (aq) + H₂ (g)

Which element is reduced in the reaction below? Fe²⁺ + H⁺ + Cr₂O₇^2- → Fe³⁺ + Cr³⁺ + H₂O

What current (inA)is required to plate out 1.22 g of nickel from a solution of Ni²⁺ in 0.50 hour?

Which substance is the oxidizing agent in the reaction below? Fe(CO)₅ (l) + 2HI (g) → Fe(CO)₄I₂ (s) + CO (g) + H₂ (g)