Consider the reaction: CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(g)Which of the following statements is correct?

A) Carbon is oxidized. B) Oxygen is the reducing agent. C) Oxygen is oxidized. D) Carbon is the oxidizing agent. E) The reaction is not an oxidation-reduction reaction. A) Carbon is oxidized. B) Oxygen is the reducing agent. C) Oxygen is oxidized. D) Carbon is the oxidizing agent. E) The reaction is not an oxidation-reduction reaction.

Consider the reaction: Sn2+(aq)+ 2Fe3+(aq)→ Sn4+(aq)+ 2Fe2+(aq)Which species is reduced, and how many electrons are transferred per Sn2+ ion that reacts?

A) Sn2+, 2 electrons B) Fe3+, 2 electrons C) Sn4+, 4 electrons D) Fe2+, 4 electrons E) Fe2+, 2 electrons A) Sn2+, 2 electrons B) Fe3+, 2 electrons C) Sn4+, 4 electrons D) Fe2+, 4 electrons E) Fe2+, 2 electrons

The figure shows the electrolysis of molten AlCl3. What reaction occurs at the cathode of this cell?

A) AlCl3(l)→ AlCl2(l) B) Cl-(l)+ e- → Cl2- C) Al3+(l)+ 3e- → Al(l) D) 2Cl-(l)+ 2e- → Cl2(g) E) 2Cl-(l)→ Cl2(g)+ 2e- A) AlCl3(l)→ AlCl2(l) B) Cl-(l)+ e- → Cl2- C) Al3+(l)+ 3e- → Al(l) D) 2Cl-(l)+ 2e- → Cl2(g) E) 2Cl-(l)→ Cl2(g)+ 2e-

Consider the reaction: H2O(l)+ 3SO32−(aq)+ 2MnO4−(aq)→ 3SO42−(aq)+ 2MnO2(s)+ 2OH−(aq)Which species is the reducing agent?

A) H2O B) SO32− C) MnO4− D) SO42− E) MnO2 A) H2O B) SO32− C) MnO4− D) SO42− E) MnO2

Consider a voltaic cell that corresponds to the following reaction: Fe(s)+ Ni2+(aq)→ Fe2+(aq)+ Ni(s)Which of the following statements is correct?

A) Iron is the oxidizing agent. B) The Ni2+ solution must be in the half-cell with the iron electrode. C) No salt bridge is necessary, since the charge is 2+ on both sides of the equation. D) The nickel electrode is the cathode. E) Four electrons will be transferred per atom of iron that reacts. A) Iron is the oxidizing agent. B) The Ni2+ solution must be in the half-cell with the iron electrode. C) No salt bridge is necessary, since the charge is 2+ on both sides of the equation. D) The nickel electrode is the cathode. E) Four electrons will be transferred per atom of iron that reacts.

What are the oxidation numbers of the atoms in the Cr2O72− ion?

A) Cr = 1-, O = 0 B) Cr = 0, O = 2- C) Cr = 6+, O = 2- D) Cr = 7+, O = 2- E) Cr = 3+, O = 1- A) Cr = 1-, O = 0 B) Cr = 0, O = 2- C) Cr = 6+, O = 2- D) Cr = 7+, O = 2- E) Cr = 3+, O = 1-

The reaction that occurs in an alkaline battery is as follows: Zn(s)+ MnO2(s)+ H2O(l)→ ZnO(s)+ Mn(OH)2(s)The substance that is oxidized in this battery is:

A) Zn B) ZnO C) MnO2 D) H2O E) Mn(OH)2 A) Zn B) ZnO C) MnO2 D) H2O E) Mn(OH)2

Exam 14: Oxidation-Reduction Reactions

Consider the half-reaction NO³−(aq)→ NO(aq). When the equation is balanced in acid solution, the coefficient for water will be , and the number of electrons transferred will be .

(Multiple Choice)

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Question 21

Consider the reaction: H₃AsO₃(aq)+ BiO₃⁻(aq)→ H₃AsO₄(aq)+ Bi(s)When this equation is balanced in acidic solution, the coefficient for water will be , and the number of electrons transferred will be .

(Multiple Choice)

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Question 22

Consider a voltaic cell that corresponds to the following reaction: Cu(s)+ 2Ag⁺(aq)→ Cu²⁺(aq)+ Ag(s)If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

(Multiple Choice)

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Question 23

The balanced half-reaction for the oxidation of nickel to nickel(II)is Ni(s)→ Ni²⁺(aq)+ 2e⁻.

(True/False)

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Question 24

The products of the electrolysis of molten calcium chloride are

(Multiple Choice)

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Question 25

Consider the reaction: CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g)Which of the following statements is correct?

(Multiple Choice)

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Question 26

Consider the reaction: Sn²⁺(aq)+ 2Fe³⁺(aq)→ Sn⁴⁺(aq)+ 2Fe²⁺(aq)Which species is reduced, and how many electrons are transferred per Sn²⁺ ion that reacts?

(Multiple Choice)

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Question 27

The figure shows the electrolysis of molten AlCl₃. What reaction occurs at the cathode of this cell?

(Multiple Choice)

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Question 28

Consider the reaction: H₂O(l)+ 3SO₃²⁻(aq)+ 2MnO₄⁻(aq)→ 3SO₄²⁻(aq)+ 2MnO₂(s)+ 2OH⁻(aq)Which species is the reducing agent?

(Multiple Choice)

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Question 29

Consider the reaction: Zn(s)+ H₂SO₄(aq)→ ZnSO₄(aq)+ H₂(g)Which species is reduced, and how many electrons are transferred per atom of zinc that reacts?

(Multiple Choice)

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Question 30

Consider a voltaic cell that corresponds to the following reaction: Fe(s)+ Ni²⁺(aq)→ Fe²⁺(aq)+ Ni(s)Which of the following statements is correct?

(Multiple Choice)

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Question 31

Consider the reaction: Zn(s)+ NO₃⁻(aq)→ NH₃(aq)+ Zn(OH)₄²⁻(aq)When this equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

(Multiple Choice)

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Question 32

Reduction is a chemical process in which an atom's oxidation number decreases.

(True/False)

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Question 33

Consider the half-reaction O₂(aq)→ OH^-(aq). When the equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

(Multiple Choice)

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Question 34

What are the oxidation numbers of the atoms in the Cr₂O₇²⁻ ion?

(Multiple Choice)

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Question 35

In which of the following choices is the oxidation number incorrect?

(Multiple Choice)

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Question 36

The reaction that occurs in an alkaline battery is as follows: Zn(s)+ MnO₂(s)+ H₂O(l)→ ZnO(s)+ Mn(OH)₂(s)The substance that is oxidized in this battery is:

(Multiple Choice)

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Question 37

In a voltaic cell, the electron flow is always from

(Multiple Choice)

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Question 38

A voltaic cell is prepared in which aluminum metal is oxidized to Al³⁺, and nickel(II)is reduced to nickel metal. Which of the following represents the equation for the reaction that occurs at the anode?

(Multiple Choice)

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Question 39

What are the oxidation numbers of the atoms in the AsO₄^3- ion?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 120

Consider the half-reaction NO³−(aq)→ NO(aq). When the equation is balanced in acid solution, the coefficient for water will be , and the number of electrons transferred will be .

Consider the reaction: H₃AsO₃(aq)+ BiO₃⁻(aq)→ H₃AsO₄(aq)+ Bi(s)When this equation is balanced in acidic solution, the coefficient for water will be , and the number of electrons transferred will be .

Consider a voltaic cell that corresponds to the following reaction: Cu(s)+ 2Ag⁺(aq)→ Cu²⁺(aq)+ Ag(s)If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

The balanced half-reaction for the oxidation of nickel to nickel(II)is Ni(s)→ Ni²⁺(aq)+ 2e⁻.

The products of the electrolysis of molten calcium chloride are

Consider the reaction: CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g)Which of the following statements is correct?

Consider the reaction: Sn²⁺(aq)+ 2Fe³⁺(aq)→ Sn⁴⁺(aq)+ 2Fe²⁺(aq)Which species is reduced, and how many electrons are transferred per Sn²⁺ ion that reacts?

The figure shows the electrolysis of molten AlCl₃. What reaction occurs at the cathode of this cell?

Consider the reaction: H₂O(l)+ 3SO₃²⁻(aq)+ 2MnO₄⁻(aq)→ 3SO₄²⁻(aq)+ 2MnO₂(s)+ 2OH⁻(aq)Which species is the reducing agent?

Consider the reaction: Zn(s)+ H₂SO₄(aq)→ ZnSO₄(aq)+ H₂(g)Which species is reduced, and how many electrons are transferred per atom of zinc that reacts?

Consider a voltaic cell that corresponds to the following reaction: Fe(s)+ Ni²⁺(aq)→ Fe²⁺(aq)+ Ni(s)Which of the following statements is correct?

Consider the reaction: Zn(s)+ NO₃⁻(aq)→ NH₃(aq)+ Zn(OH)₄²⁻(aq)When this equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

Reduction is a chemical process in which an atom's oxidation number decreases.

Consider the half-reaction O₂(aq)→ OH^-(aq). When the equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

What are the oxidation numbers of the atoms in the Cr₂O₇²⁻ ion?

In which of the following choices is the oxidation number incorrect?

The reaction that occurs in an alkaline battery is as follows: Zn(s)+ MnO₂(s)+ H₂O(l)→ ZnO(s)+ Mn(OH)₂(s)The substance that is oxidized in this battery is:

In a voltaic cell, the electron flow is always from

A voltaic cell is prepared in which aluminum metal is oxidized to Al³⁺, and nickel(II)is reduced to nickel metal. Which of the following represents the equation for the reaction that occurs at the anode?

What are the oxidation numbers of the atoms in the AsO₄^3- ion?

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Exam 14: Oxidation-Reduction Reactions

Consider the half-reaction NO3−(aq)→ NO(aq). When the equation is balanced in acid solution, the coefficient for water will be ________, and the number of electrons transferred will be ________.

Consider the reaction: H3AsO3(aq)+ BiO3−(aq)→ H3AsO4(aq)+ Bi(s)When this equation is balanced in acidic solution, the coefficient for water will be ________, and the number of electrons transferred will be ________.

Consider a voltaic cell that corresponds to the following reaction: Cu(s)+ 2Ag+(aq)→ Cu2+(aq)+ Ag(s)If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

The balanced half-reaction for the oxidation of nickel to nickel(II)is Ni(s)→ Ni2+(aq)+ 2e−.

The products of the electrolysis of molten calcium chloride are

Consider the reaction: CH4(g)+ 2O2(g)→ CO2(g)+ 2H2O(g)Which of the following statements is correct?

Consider the reaction: Sn2+(aq)+ 2Fe3+(aq)→ Sn4+(aq)+ 2Fe2+(aq)Which species is reduced, and how many electrons are transferred per Sn2+ ion that reacts?

The figure shows the electrolysis of molten AlCl3. What reaction occurs at the cathode of this cell?

Consider the reaction: H2O(l)+ 3SO32−(aq)+ 2MnO4−(aq)→ 3SO42−(aq)+ 2MnO2(s)+ 2OH−(aq)Which species is the reducing agent?

Consider the reaction: Zn(s)+ H2SO4(aq)→ ZnSO4(aq)+ H2(g)Which species is reduced, and how many electrons are transferred per atom of zinc that reacts?

Consider a voltaic cell that corresponds to the following reaction: Fe(s)+ Ni2+(aq)→ Fe2+(aq)+ Ni(s)Which of the following statements is correct?

Consider the reaction: Zn(s)+ NO3−(aq)→ NH3(aq)+ Zn(OH)42−(aq)When this equation is balanced in basic solution, the coefficient for water will be ________, and the number of electrons transferred will be ________.

Reduction is a chemical process in which an atom's oxidation number decreases.

Consider the half-reaction O2(aq)→ OH-(aq). When the equation is balanced in basic solution, the coefficient for water will be ________, and the number of electrons transferred will be ________.

What are the oxidation numbers of the atoms in the Cr2O72− ion?

In which of the following choices is the oxidation number incorrect?

The reaction that occurs in an alkaline battery is as follows: Zn(s)+ MnO2(s)+ H2O(l)→ ZnO(s)+ Mn(OH)2(s)The substance that is oxidized in this battery is:

In a voltaic cell, the electron flow is always from

A voltaic cell is prepared in which aluminum metal is oxidized to Al3+, and nickel(II)is reduced to nickel metal. Which of the following represents the equation for the reaction that occurs at the anode?

What are the oxidation numbers of the atoms in the AsO43- ion?

Matter and Energy

Atoms, Ions, and the Periodic Table

Chemical Compounds

Chemical Composition

Chemical Reactions and Equations

Quantities in Chemical Reactions

Electron Structure of the Atom

Chemical Bonding

The Gaseous State

The Liquid and Solid States

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Consider the half-reaction NO³−(aq)→ NO(aq). When the equation is balanced in acid solution, the coefficient for water will be , and the number of electrons transferred will be .

Consider the reaction: H₃AsO₃(aq)+ BiO₃⁻(aq)→ H₃AsO₄(aq)+ Bi(s)When this equation is balanced in acidic solution, the coefficient for water will be , and the number of electrons transferred will be .

Consider a voltaic cell that corresponds to the following reaction: Cu(s)+ 2Ag⁺(aq)→ Cu²⁺(aq)+ Ag(s)If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

The balanced half-reaction for the oxidation of nickel to nickel(II)is Ni(s)→ Ni²⁺(aq)+ 2e⁻.

Consider the reaction: CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g)Which of the following statements is correct?

Consider the reaction: Sn²⁺(aq)+ 2Fe³⁺(aq)→ Sn⁴⁺(aq)+ 2Fe²⁺(aq)Which species is reduced, and how many electrons are transferred per Sn²⁺ ion that reacts?

The figure shows the electrolysis of molten AlCl₃. What reaction occurs at the cathode of this cell?

Consider the reaction: H₂O(l)+ 3SO₃²⁻(aq)+ 2MnO₄⁻(aq)→ 3SO₄²⁻(aq)+ 2MnO₂(s)+ 2OH⁻(aq)Which species is the reducing agent?

Consider the reaction: Zn(s)+ H₂SO₄(aq)→ ZnSO₄(aq)+ H₂(g)Which species is reduced, and how many electrons are transferred per atom of zinc that reacts?

Consider a voltaic cell that corresponds to the following reaction: Fe(s)+ Ni²⁺(aq)→ Fe²⁺(aq)+ Ni(s)Which of the following statements is correct?

Consider the reaction: Zn(s)+ NO₃⁻(aq)→ NH₃(aq)+ Zn(OH)₄²⁻(aq)When this equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

Consider the half-reaction O₂(aq)→ OH^-(aq). When the equation is balanced in basic solution, the coefficient for water will be , and the number of electrons transferred will be .

What are the oxidation numbers of the atoms in the Cr₂O₇²⁻ ion?

The reaction that occurs in an alkaline battery is as follows: Zn(s)+ MnO₂(s)+ H₂O(l)→ ZnO(s)+ Mn(OH)₂(s)The substance that is oxidized in this battery is:

A voltaic cell is prepared in which aluminum metal is oxidized to Al³⁺, and nickel(II)is reduced to nickel metal. Which of the following represents the equation for the reaction that occurs at the anode?

What are the oxidation numbers of the atoms in the AsO₄^3- ion?