Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu2+(aq) $\rightarrow$Zn2+(aq) + Cu(s) Which of the following statements is correct?

A) Zinc is the oxidizing agent. B) The Cu2+ solution must be in the half-cell with the zinc electrode. C) No salt bridge is necessary, since the charge is 2+ on both sides of the equation. D) The zinc electrode is the cathode. E) Two electrons will be transferred in this reaction per atom of zinc that reacts. A) Zinc is the oxidizing agent. B) The Cu2+ solution must be in the half-cell with the zinc electrode. C) No salt bridge is necessary, since the charge is 2+ on both sides of the equation. D) The zinc electrode is the cathode. E) Two electrons will be transferred in this reaction per atom of zinc that reacts.

The change, Br2 + H2O $\rightarrow$ HOBr + HBr, is

A) oxidation only. B) reduction only. C) both oxidation and reduction. D) neither oxidation nor reduction. E) an acid-base reaction. A) oxidation only. B) reduction only. C) both oxidation and reduction. D) neither oxidation nor reduction. E) an acid-base reaction.

The reaction that occurs in an alkaline battery is as follows: Zn(s) + MnO2(s) + H2O(l) $\rightarrow$ 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

Consider the following reaction: Mg(s) + ZnSO4(aq) $\rightarrow$ MgSO4(aq) + Zn(s) Which of the following statements regarding this reaction is correct?

A) Magnesium is neither oxidized nor reduced. B) The sulfate ion is reduced. C) Zinc is the reducing agent. D) Magnesium is the oxidizing agent. E) Zinc gains two electrons. A) Magnesium is neither oxidized nor reduced. B) The sulfate ion is reduced. C) Zinc is the reducing agent. D) Magnesium is the oxidizing agent. E) Zinc gains two electrons.

For the following reaction, what is the oxidizing agent? 2Cl2(g) + C(s) + 2H2O(l) $\rightarrow$ CO2(g) + 4HCl(aq)

A) Cl2 B) C C) H2O D) CO2 E) HCl A) Cl2 B) C C) H2O D) CO2 E) HCl

A lead-acid battery that is used in cars and trucks is powered by the reaction: PbO2(s) + Pb(s) + 2H2SO4(aq) $\rightarrow$2PbSO4(s) + H2O(l) The substance that is the reducing agent in this battery is:

A) PbSO4 B) H2O C) PbO2 D) Pb E) H2SO4 A) PbSO4 B) H2O C) PbO2 D) Pb E) H2SO4

Consider the reaction: Sn2+(aq) + 2Fe3+(aq) $\rightarrow$Sn4+(aq) + 2Fe2+(aq) Which species is oxidized, 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

Given the following reaction in a voltaic cell: Zn(s) + Ni2+(aq)$\rightarrow$Ni(s) + Zn2+(aq) In this cell, Zn(s) is called the

A) anode. B) oxidizing agent. C) salt bridge. D) electrolyte. E) cathode. A) anode. B) oxidizing agent. C) salt bridge. D) electrolyte. E) cathode.

Consider the reaction: N2(g) + 3H2(g) $\rightarrow$ 2NH3(g) Which of the following statements is correct?

A) Nitrogen is oxidized. B) Hydrogen is reduced. C) Nitrogen is the reducing agent. D) The reaction is not an oxidation-reduction reaction. E) Hydrogen is the reducing agent. A) Nitrogen is oxidized. B) Hydrogen is reduced. C) Nitrogen is the reducing agent. D) The reaction is not an oxidation-reduction reaction. E) Hydrogen is the reducing agent.

Exam 14: Oxidation-Reduction Reactions

A voltaic cell is prepared in which copper metal is oxidized to Cu(II), and silver ion is reduced to silver metal.Which of the following represents the equation for the reaction that occurs at the anode?

(Multiple Choice)

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Question 21

In any electrolytic cell, the cathode is the electrode

(Multiple Choice)

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Question 22

Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu²⁺(aq) $\rightarrow$ Zn²⁺(aq) + Cu(s) Which of the following statements is correct?

(Multiple Choice)

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Question 23

The change, Br₂ + H₂O $\rightarrow$ HOBr + HBr, is

(Multiple Choice)

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Question 24

All of these statements concerning oxidation are correct except that

(Multiple Choice)

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Question 25

What is the oxidation number of boron in sodium tetraborate, Na₂B₄O₇?

(Multiple Choice)

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Question 26

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

(Multiple Choice)

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Question 27

Consider the following reaction: Mg(s) + ZnSO₄(aq) $\rightarrow$ MgSO₄(aq) + Zn(s) Which of the following statements regarding this reaction is correct?

(Multiple Choice)

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Question 28

The figure shows the electrolysis of molten NaI.What reaction occurs at the anode of this cell?

(Multiple Choice)

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Question 29

For the following reaction, what is the oxidizing agent? 2Cl₂(g) + C(s) + 2H₂O(l) $\rightarrow$ CO₂(g) + 4HCl(aq)

(Multiple Choice)

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Question 30

A lead-acid battery that is used in cars and trucks is powered by the reaction: PbO₂(s) + Pb(s) + 2H₂SO₄(aq) $\rightarrow$ 2PbSO₄(s) + H₂O(l) The substance that is the reducing agent in this battery is:

(Multiple Choice)

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Question 31

Which of the following statements regarding oxidation-reduction reactions is correct?

(Multiple Choice)

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Question 32

A species that causes a decrease in the oxidation number of another substance is called a reducing agent.

(True/False)

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Question 33

Consider the reaction: H₃AsO₃(aq) + BiO₃^-(aq) $\rightarrow$ 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 34

Consider the reaction: Sn²⁺(aq) + 2Fe³⁺(aq) $\rightarrow$ Sn⁴⁺(aq) + 2Fe²⁺(aq) Which species is oxidized, and how many electrons are transferred per SN₂+ ion that reacts?

(Multiple Choice)

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Question 35

In which compound does phosphorus have an oxidation number of 3+?

(Multiple Choice)

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Question 36

Consider the half-reaction Cr³⁺(aq) $\rightarrow$ Cr₂O₇²^-(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 37

Given the following reaction in a voltaic cell: Zn(s) + Ni²⁺(aq) $\rightarrow$ Ni(s) + Zn²⁺(aq) In this cell, Zn(s) is called the

(Multiple Choice)

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Question 38

Consider the reaction: Al(s) + H₂O(l) $\rightarrow$ Al(OH)₄-(aq) + H₂(g) 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 39

Consider the reaction: N₂(g) + 3H₂(g) $\rightarrow$ 2NH₃(g) Which of the following statements is correct?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 117

A voltaic cell is prepared in which copper metal is oxidized to Cu(II), and silver ion is reduced to silver metal.Which of the following represents the equation for the reaction that occurs at the anode?

In any electrolytic cell, the cathode is the electrode

Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu²⁺(aq) $\rightarrow$ Zn²⁺(aq) + Cu(s) Which of the following statements is correct?

The change, Br₂ + H₂O $\rightarrow$ HOBr + HBr, is

All of these statements concerning oxidation are correct except that

What is the oxidation number of boron in sodium tetraborate, Na₂B₄O₇?

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

Consider the following reaction: Mg(s) + ZnSO₄(aq) $\rightarrow$ MgSO₄(aq) + Zn(s) Which of the following statements regarding this reaction is correct?

The figure shows the electrolysis of molten NaI.What reaction occurs at the anode of this cell?

For the following reaction, what is the oxidizing agent? 2Cl₂(g) + C(s) + 2H₂O(l) $\rightarrow$ CO₂(g) + 4HCl(aq)

A lead-acid battery that is used in cars and trucks is powered by the reaction: PbO₂(s) + Pb(s) + 2H₂SO₄(aq) $\rightarrow$ 2PbSO₄(s) + H₂O(l) The substance that is the reducing agent in this battery is:

Which of the following statements regarding oxidation-reduction reactions is correct?

A species that causes a decrease in the oxidation number of another substance is called a reducing agent.

Consider the reaction: H₃AsO₃(aq) + BiO₃^-(aq) $\rightarrow$ 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 the reaction: Sn²⁺(aq) + 2Fe³⁺(aq) $\rightarrow$ Sn⁴⁺(aq) + 2Fe²⁺(aq) Which species is oxidized, and how many electrons are transferred per SN₂+ ion that reacts?

In which compound does phosphorus have an oxidation number of 3+?

Consider the half-reaction Cr³⁺(aq) $\rightarrow$ Cr₂O₇²^-(aq).When the equation is balanced in acid solution, the coefficient for water will be, and the number of electrons transferred will be .

Given the following reaction in a voltaic cell: Zn(s) + Ni²⁺(aq) $\rightarrow$ Ni(s) + Zn²⁺(aq) In this cell, Zn(s) is called the

Consider the reaction: Al(s) + H₂O(l) $\rightarrow$ Al(OH)₄-(aq) + H₂(g) When this equation is balanced in basic solution, the coefficient for water will be, and the number of electrons transferred will be .

Consider the reaction: N₂(g) + 3H₂(g) $\rightarrow$ 2NH₃(g) Which of the following statements is correct?

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Exam 14: Oxidation-Reduction Reactions

A voltaic cell is prepared in which copper metal is oxidized to Cu(II), and silver ion is reduced to silver metal.Which of the following represents the equation for the reaction that occurs at the anode?

In any electrolytic cell, the cathode is the electrode

Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu2+(aq) →\rightarrow→ Zn2+(aq) + Cu(s) Which of the following statements is correct?

The change, Br2 + H2O →\rightarrow→ HOBr + HBr, is

All of these statements concerning oxidation are correct except that

What is the oxidation number of boron in sodium tetraborate, Na2B4O7?

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

Consider the following reaction: Mg(s) + ZnSO4(aq) →\rightarrow→ MgSO4(aq) + Zn(s) Which of the following statements regarding this reaction is correct?

The figure shows the electrolysis of molten NaI.What reaction occurs at the anode of this cell?

For the following reaction, what is the oxidizing agent? 2Cl2(g) + C(s) + 2H2O(l) →\rightarrow→ CO2(g) + 4HCl(aq)

A lead-acid battery that is used in cars and trucks is powered by the reaction: PbO2(s) + Pb(s) + 2H2SO4(aq) →\rightarrow→ 2PbSO4(s) + H2O(l) The substance that is the reducing agent in this battery is:

Which of the following statements regarding oxidation-reduction reactions is correct?

A species that causes a decrease in the oxidation number of another substance is called a reducing agent.

Consider the reaction: H3AsO3(aq) + BiO3-(aq) →\rightarrow→ 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 the reaction: Sn2+(aq) + 2Fe3+(aq) →\rightarrow→ Sn4+(aq) + 2Fe2+(aq) Which species is oxidized, and how many electrons are transferred per SN2+ ion that reacts?

In which compound does phosphorus have an oxidation number of 3+?

Consider the half-reaction Cr3+(aq) →\rightarrow→ Cr2O72-(aq).When the equation is balanced in acid solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

Given the following reaction in a voltaic cell: Zn(s) + Ni2+(aq) →\rightarrow→ Ni(s) + Zn2+(aq) In this cell, Zn(s) is called the

Consider the reaction: Al(s) + H2O(l) →\rightarrow→ Al(OH)4-(aq) + H2(g) When this equation is balanced in basic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

Consider the reaction: N2(g) + 3H2(g) →\rightarrow→ 2NH3(g) Which of the following statements is correct?

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

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Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu²⁺(aq) $\rightarrow$ Zn²⁺(aq) + Cu(s) Which of the following statements is correct?

The change, Br₂ + H₂O $\rightarrow$ HOBr + HBr, is

What is the oxidation number of boron in sodium tetraborate, Na₂B₄O₇?

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

Consider the following reaction: Mg(s) + ZnSO₄(aq) $\rightarrow$ MgSO₄(aq) + Zn(s) Which of the following statements regarding this reaction is correct?

For the following reaction, what is the oxidizing agent? 2Cl₂(g) + C(s) + 2H₂O(l) $\rightarrow$ CO₂(g) + 4HCl(aq)

A lead-acid battery that is used in cars and trucks is powered by the reaction: PbO₂(s) + Pb(s) + 2H₂SO₄(aq) $\rightarrow$ 2PbSO₄(s) + H₂O(l) The substance that is the reducing agent in this battery is:

Consider the reaction: H₃AsO₃(aq) + BiO₃^-(aq) $\rightarrow$ 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 the reaction: Sn²⁺(aq) + 2Fe³⁺(aq) $\rightarrow$ Sn⁴⁺(aq) + 2Fe²⁺(aq) Which species is oxidized, and how many electrons are transferred per SN₂+ ion that reacts?

Consider the half-reaction Cr³⁺(aq) $\rightarrow$ Cr₂O₇²^-(aq).When the equation is balanced in acid solution, the coefficient for water will be, and the number of electrons transferred will be .

Given the following reaction in a voltaic cell: Zn(s) + Ni²⁺(aq) $\rightarrow$ Ni(s) + Zn²⁺(aq) In this cell, Zn(s) is called the

Consider the reaction: Al(s) + H₂O(l) $\rightarrow$ Al(OH)₄-(aq) + H₂(g) When this equation is balanced in basic solution, the coefficient for water will be, and the number of electrons transferred will be .

Consider the reaction: N₂(g) + 3H₂(g) $\rightarrow$ 2NH₃(g) Which of the following statements is correct?