The figure shows a molecular-level representation of the following voltaic cell: Fe(s) + Ni2+(aq) $\rightarrow$Fe2+(aq) + Ni(s) When drawing the "after" representation one would note that:

A) the nickel electrode will be smaller. B) the iron electrode will be larger. C) the number of Ni2+ ions in solution will decrease. D) deposits will form in the salt bridge. E) the number of Fe2+ ions in solution will remain constant. A) the nickel electrode will be smaller. B) the iron electrode will be larger. C) the number of Ni2+ ions in solution will decrease. D) deposits will form in the salt bridge. E) the number of Fe2+ ions in solution will remain constant.

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 the reducing agent 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 reaction: Sn2+(aq) + 2Fe3+(aq) $\rightarrow$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

Consider the reaction: Ca(s) + 2H2O(l) $\rightarrow$ Ca(OH)2(aq) + H2(g) Which of the following statements is correct?

A) Calcium is reduced. B) Hydrogen is oxidized. C) Oxygen is oxidized. D) Oxygen is the reducing agent. E) Calcium is oxidized. A) Calcium is reduced. B) Hydrogen is oxidized. C) Oxygen is oxidized. D) Oxygen is the reducing agent. E) Calcium is oxidized.

Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu2+(aq) $\rightarrow$Zn2+(aq) + Cu(s) If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

A) I is the zinc electrode, which is the anode. B) II is the Cu2+ solution. C) III is the salt bridge. D) IV contains the substance that is being reduced. E) V is the copper electrode, which is the cathode. A) I is the zinc electrode, which is the anode. B) II is the Cu2+ solution. C) III is the salt bridge. D) IV contains the substance that is being reduced. E) V is the copper electrode, which is the cathode.

Given the following reaction in a voltaic cell: Cu(s) + 2Ag+(aq)$\rightarrow$2Ag(s) + Cu2+(aq) Which of the following statements is correct?

A) Cu(s) is the anode. B) Oxidation occurs at the silver electrode. C) There is no cathode for this cell. D) Ag(s) is the anode. E) One mole of electrons is transferred in the reaction as written. A) Cu(s) is the anode. B) Oxidation occurs at the silver electrode. C) There is no cathode for this cell. D) Ag(s) is the anode. E) One mole of electrons is transferred in the reaction as written.

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

A) Zn, 2 electrons B) H+, 2 electrons C) SO42-, 4 electrons D) Zn2+, 4 electrons E) H2, 2 electrons A) Zn, 2 electrons B) H+, 2 electrons C) SO42-, 4 electrons D) Zn2+, 4 electrons E) H2, 2 electrons

Consider a voltaic cell that corresponds to the following reaction: Cu(s) + 2Ag+(aq) $\rightarrow$Cu2+(aq) + Ag(s) Which of the following statements is correct?

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

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

A) Zn, 2 electrons B) H+, 2 electrons C) SO42-, 4 electrons D) Zn2+, 4 electrons E) H2, 2 electrons A) Zn, 2 electrons B) H+, 2 electrons C) SO42-, 4 electrons D) Zn2+, 4 electrons E) H2, 2 electrons

What is the oxidation number of sulfur in S2O32-?

A) +6 B) -2 C) +4 D) +2 E) +3 A) +6 B) -2 C) +4 D) +2 E) +3

Exam 14: Oxidation-Reduction Reactions

Given the following information about the activity series, predict whether the given reaction will occur or not.If it does occur, write a balanced equation.Cu < H₂ < Sn < Fe < Zn < Mg Fe(s) + SnCl₂(aq) $\rightarrow$

(Multiple Choice)

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Question 41

The figure shows a molecular-level representation of the following voltaic cell: Fe(s) + Ni²⁺(aq) $\rightarrow$ Fe²⁺(aq) + Ni(s) When drawing the "after" representation one would note that: $The figure shows a molecular-level representation of the following voltaic cell: Fe(s) + Ni2+(aq) \rightarrow Fe2+(aq) + Ni(s) When drawing the after representation one would note that:$

(Multiple Choice)

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Question 42

In a fuel cell that uses gaseous hydrogen and oxygen as reactants, which one of the following reactions is occurring at the anode?

(Multiple Choice)

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Question 43

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 the reducing agent in this battery is:

(Multiple Choice)

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Question 44

Consider the reaction: Sn²⁺(aq) + 2Fe³⁺(aq) $\rightarrow$ 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 45

Which of the following sulfur species cannot be further reduced?

(Multiple Choice)

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Question 46

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

(True/False)

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Question 47

Consider the reaction: Ca(s) + 2H₂O(l) $\rightarrow$ Ca(OH)₂(aq) + H₂(g) Which of the following statements is correct?

(Multiple Choice)

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Question 48

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

(Multiple Choice)

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Question 49

The ion shown has a charge of 2-.What are the oxidation numbers of the atoms in the ion?

(Multiple Choice)

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Question 50

Consider the half-reaction NH₄+(aq) $\rightarrow$ NO₃-(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 51

Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu²⁺(aq) $\rightarrow$ Zn²⁺(aq) + Cu(s) If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect? $Consider a voltaic cell that corresponds to the following reaction: Zn(s) + Cu2+(aq) \rightarrow Zn2+(aq) + Cu(s) If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?$

(Multiple Choice)

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Question 52

Given the following reaction in a voltaic cell: Cu(s) + 2Ag⁺(aq) $\rightarrow$ 2Ag(s) + Cu²⁺(aq) Which of the following statements is correct?

(Multiple Choice)

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Question 53

An electrolytic cell is an electrochemical cell in which an oxidation-reduction reaction causes electrons to flow through an external circuit.

(True/False)

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Question 54

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

(Multiple Choice)

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Question 55

Consider a voltaic cell that corresponds to the following reaction: Cu(s) + 2Ag⁺(aq) $\rightarrow$ Cu²⁺(aq) + Ag(s) Which of the following statements is correct?

(Multiple Choice)

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Question 56

The following reaction occurs in acid solution.When the equation is properly balanced with the smallest whole-number coefficients, what is the coefficient of MnO₄- $\rightarrow$ MnO₄-(aq) + I^-(aq) $\rightarrow$ Mn²⁺(aq) + I²(aq)

(Multiple Choice)

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Question 57

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

(Multiple Choice)

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Question 58

What is the oxidation number of sulfur in S₂O₃²^-?

(Multiple Choice)

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Question 59

What is the oxidation number of chlorine in sodium perchlorate, NaClO₄?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 117

Given the following information about the activity series, predict whether the given reaction will occur or not.If it does occur, write a balanced equation.Cu < H₂ < Sn < Fe < Zn < Mg Fe(s) + SnCl₂(aq) $\rightarrow$

In a fuel cell that uses gaseous hydrogen and oxygen as reactants, which one of the following reactions is occurring at the anode?

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 the reducing agent in this battery is:

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

Which of the following sulfur species cannot be further reduced?

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

Consider the reaction: Ca(s) + 2H₂O(l) $\rightarrow$ Ca(OH)₂(aq) + H₂(g) Which of the following statements is correct?

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

The ion shown has a charge of 2-.What are the oxidation numbers of the atoms in the ion?

Consider the half-reaction NH₄+(aq) $\rightarrow$ NO₃-(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: Cu(s) + 2Ag⁺(aq) $\rightarrow$ 2Ag(s) + Cu²⁺(aq) Which of the following statements is correct?

An electrolytic cell is an electrochemical cell in which an oxidation-reduction reaction causes electrons to flow through an external circuit.

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

Consider a voltaic cell that corresponds to the following reaction: Cu(s) + 2Ag⁺(aq) $\rightarrow$ Cu²⁺(aq) + Ag(s) Which of the following statements is correct?

The following reaction occurs in acid solution.When the equation is properly balanced with the smallest whole-number coefficients, what is the coefficient of MnO₄- $\rightarrow$ MnO₄-(aq) + I^-(aq) $\rightarrow$ Mn²⁺(aq) + I²(aq)

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

What is the oxidation number of sulfur in S₂O₃²^-?

What is the oxidation number of chlorine in sodium perchlorate, NaClO₄?

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Exam 14: Oxidation-Reduction Reactions

Given the following information about the activity series, predict whether the given reaction will occur or not.If it does occur, write a balanced equation.Cu < H2 < Sn < Fe < Zn < Mg Fe(s) + SnCl2(aq) →\rightarrow→

The figure shows a molecular-level representation of the following voltaic cell: Fe(s) + Ni2+(aq) →\rightarrow→ Fe2+(aq) + Ni(s) When drawing the "after" representation one would note that:

In a fuel cell that uses gaseous hydrogen and oxygen as reactants, which one of the following reactions is occurring at the anode?

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 the reducing agent in this battery is:

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

Which of the following sulfur species cannot be further reduced?

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

Consider the reaction: Ca(s) + 2H2O(l) →\rightarrow→ Ca(OH)2(aq) + H2(g) Which of the following statements is correct?

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

The ion shown has a charge of 2-.What are the oxidation numbers of the atoms in the ion?

Consider the half-reaction NH4+(aq) →\rightarrow→ NO3-(aq).When the equation is balanced in acid 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: Zn(s) + Cu2+(aq) →\rightarrow→ Zn2+(aq) + Cu(s) If this reaction takes place in the electrochemical cell shown in the figure, which of the following statements is incorrect?

Given the following reaction in a voltaic cell: Cu(s) + 2Ag+(aq) →\rightarrow→ 2Ag(s) + Cu2+(aq) Which of the following statements is correct?

An electrolytic cell is an electrochemical cell in which an oxidation-reduction reaction causes electrons to flow through an external circuit.

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

Consider a voltaic cell that corresponds to the following reaction: Cu(s) + 2Ag+(aq) →\rightarrow→ Cu2+(aq) + Ag(s) Which of the following statements is correct?

The following reaction occurs in acid solution.When the equation is properly balanced with the smallest whole-number coefficients, what is the coefficient of MnO4- →\rightarrow→ MnO4-(aq) + I-(aq) →\rightarrow→ Mn2+(aq) + I2(aq)

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

What is the oxidation number of sulfur in S2O32-?

What is the oxidation number of chlorine in sodium perchlorate, NaClO4?

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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Given the following information about the activity series, predict whether the given reaction will occur or not.If it does occur, write a balanced equation.Cu < H₂ < Sn < Fe < Zn < Mg Fe(s) + SnCl₂(aq) $\rightarrow$

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 the reducing agent in this battery is:

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

Consider the reaction: Ca(s) + 2H₂O(l) $\rightarrow$ Ca(OH)₂(aq) + H₂(g) Which of the following statements is correct?

Consider the half-reaction NH₄+(aq) $\rightarrow$ NO₃-(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: Cu(s) + 2Ag⁺(aq) $\rightarrow$ 2Ag(s) + Cu²⁺(aq) Which of the following statements is correct?

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

Consider a voltaic cell that corresponds to the following reaction: Cu(s) + 2Ag⁺(aq) $\rightarrow$ Cu²⁺(aq) + Ag(s) Which of the following statements is correct?

The following reaction occurs in acid solution.When the equation is properly balanced with the smallest whole-number coefficients, what is the coefficient of MnO₄- $\rightarrow$ MnO₄-(aq) + I^-(aq) $\rightarrow$ Mn²⁺(aq) + I²(aq)

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

What is the oxidation number of sulfur in S₂O₃²^-?

What is the oxidation number of chlorine in sodium perchlorate, NaClO₄?