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A galvanic cell is constructed using the two hypothetical half-reactions A + e- → B E° = +1.50 V and C + 2e- → D E° = -0.50 V a.Calculate the standard potential of this cell,E°cell . b.Calculate ΔG° for the cell reaction.(1 faraday = 96,500 C)

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a.2.00 V b...

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Which metal is not capable of acting as a sacrificial anode when used with iron pipe? Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)


A) Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)
B) Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)
C) Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)
D) Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)
E) Which metal is not capable of acting as a sacrificial anode when used with iron pipe?   A)    B)    C)    D)    E)

F) A) and E)
G) B) and C)

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What is the cell potential at 25°C for the following reaction if [Zn2+] = 1.0 × 10-4 M and [Sn2+] = 0.20 M ? (R = 8.314 J/K • mol,F = 96,500 C • mol-1) Zn2+(aq) + Sn(s) → Zn(s) + Sn2+(aq) E°cell = -0.62 V


A) -0.62 V
B) +0.52 V
C) -0.52 V
D) -0.72 V
E) +0.72 V

F) A) and B)
G) B) and C)

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Given Cu2+(aq) + 2e- → Cu(s) E° = +0.34 V Al3+(aq) + 3e- → Al(s) E° = -1.66 V Na+(aq) + e- → Na(s) E° = -2.71 V Which of the following reactions will occur?


A) 2Na+(aq) + Cu(s) → Cu2+(aq) + 2Na(s)
B) Al(s) + 3Na+(aq) → Al3+(aq) + 3Na(s)
C) 2Na(s) + Cu2+(aq) → Cu(s) + 2Na+(aq)
D) 2Al3+(aq) + 3Cu(s) → 3Cu2+(aq) + 2Al(s)
E) None of the will occur.

F) A) and D)
G) All of the above

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Which is the correct cell notation for the following reaction? Au3+(aq) + Al(s) → Al3+(aq) + Au(s)


A) Al3+(aq) |Al(s) ||Au3+(aq) |Au(s)
B) Al(s) |Al3+(aq) ||Au3+(aq) |Au(s)
C) Al3+(aq) |Au3+(aq) ||Al(s) |Au(s)
D) Al3+(aq) |Au(s) ||Au3+(aq) |Al(s)
E) Au(s) |Al(s) ||Au3+(aq) |Al3+(aq)

F) A) and B)
G) A) and C)

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Based on the data presented below,which is the strongest oxidizing agent? [PtCl4]2-(aq) + 2e- Based on the data presented below,which is the strongest oxidizing agent? [PtCl<sub>4</sub>]<sup>2-</sup>(aq) + 2e<sup>-</sup> <sup> </sup>   Pt(s) + 4Cl<sup>-</sup>(aq) E° = 0.755V RuO<sub>4</sub>(s) + 8H<sup>+</sup>(aq) + 8e<sup>-</sup>   Ru(s) + 4H<sub>2</sub>O(l) E° = 1.038V FeO<sub>4</sub><sup>2-</sup>(aq) + 8H<sup>+</sup>(aq) + 3e<sup>-</sup>   Fe<sup>3+</sup>(aq) +4H<sub>2</sub>O(l) E° = 2.07 V H<sub>4</sub>XeO<sub>6</sub>(aq) + 2H<sup>+</sup>(aq) + 2e<sup>-</sup>   XeO<sub>3</sub>(aq) +3H<sub>2</sub>O(l) E° = 2.42 V A) [PtCl<sub>4</sub>]<sup>2-</sup>(aq)  B) RuO<sub>4</sub>(s)  C) HFeO<sub>4</sub><sup>-</sup>(aq)  D) H<sub>4</sub>XeO<sub>6</sub>(aq)  E) Cl<sup>-</sup>(aq) Pt(s) + 4Cl-(aq) E° = 0.755V RuO4(s) + 8H+(aq) + 8e- Based on the data presented below,which is the strongest oxidizing agent? [PtCl<sub>4</sub>]<sup>2-</sup>(aq) + 2e<sup>-</sup> <sup> </sup>   Pt(s) + 4Cl<sup>-</sup>(aq) E° = 0.755V RuO<sub>4</sub>(s) + 8H<sup>+</sup>(aq) + 8e<sup>-</sup>   Ru(s) + 4H<sub>2</sub>O(l) E° = 1.038V FeO<sub>4</sub><sup>2-</sup>(aq) + 8H<sup>+</sup>(aq) + 3e<sup>-</sup>   Fe<sup>3+</sup>(aq) +4H<sub>2</sub>O(l) E° = 2.07 V H<sub>4</sub>XeO<sub>6</sub>(aq) + 2H<sup>+</sup>(aq) + 2e<sup>-</sup>   XeO<sub>3</sub>(aq) +3H<sub>2</sub>O(l) E° = 2.42 V A) [PtCl<sub>4</sub>]<sup>2-</sup>(aq)  B) RuO<sub>4</sub>(s)  C) HFeO<sub>4</sub><sup>-</sup>(aq)  D) H<sub>4</sub>XeO<sub>6</sub>(aq)  E) Cl<sup>-</sup>(aq) Ru(s) + 4H2O(l) E° = 1.038V FeO42-(aq) + 8H+(aq) + 3e- Based on the data presented below,which is the strongest oxidizing agent? [PtCl<sub>4</sub>]<sup>2-</sup>(aq) + 2e<sup>-</sup> <sup> </sup>   Pt(s) + 4Cl<sup>-</sup>(aq) E° = 0.755V RuO<sub>4</sub>(s) + 8H<sup>+</sup>(aq) + 8e<sup>-</sup>   Ru(s) + 4H<sub>2</sub>O(l) E° = 1.038V FeO<sub>4</sub><sup>2-</sup>(aq) + 8H<sup>+</sup>(aq) + 3e<sup>-</sup>   Fe<sup>3+</sup>(aq) +4H<sub>2</sub>O(l) E° = 2.07 V H<sub>4</sub>XeO<sub>6</sub>(aq) + 2H<sup>+</sup>(aq) + 2e<sup>-</sup>   XeO<sub>3</sub>(aq) +3H<sub>2</sub>O(l) E° = 2.42 V A) [PtCl<sub>4</sub>]<sup>2-</sup>(aq)  B) RuO<sub>4</sub>(s)  C) HFeO<sub>4</sub><sup>-</sup>(aq)  D) H<sub>4</sub>XeO<sub>6</sub>(aq)  E) Cl<sup>-</sup>(aq) Fe3+(aq) +4H2O(l) E° = 2.07 V H4XeO6(aq) + 2H+(aq) + 2e- Based on the data presented below,which is the strongest oxidizing agent? [PtCl<sub>4</sub>]<sup>2-</sup>(aq) + 2e<sup>-</sup> <sup> </sup>   Pt(s) + 4Cl<sup>-</sup>(aq) E° = 0.755V RuO<sub>4</sub>(s) + 8H<sup>+</sup>(aq) + 8e<sup>-</sup>   Ru(s) + 4H<sub>2</sub>O(l) E° = 1.038V FeO<sub>4</sub><sup>2-</sup>(aq) + 8H<sup>+</sup>(aq) + 3e<sup>-</sup>   Fe<sup>3+</sup>(aq) +4H<sub>2</sub>O(l) E° = 2.07 V H<sub>4</sub>XeO<sub>6</sub>(aq) + 2H<sup>+</sup>(aq) + 2e<sup>-</sup>   XeO<sub>3</sub>(aq) +3H<sub>2</sub>O(l) E° = 2.42 V A) [PtCl<sub>4</sub>]<sup>2-</sup>(aq)  B) RuO<sub>4</sub>(s)  C) HFeO<sub>4</sub><sup>-</sup>(aq)  D) H<sub>4</sub>XeO<sub>6</sub>(aq)  E) Cl<sup>-</sup>(aq) XeO3(aq) +3H2O(l) E° = 2.42 V


A) [PtCl4]2-(aq)
B) RuO4(s)
C) HFeO4-(aq)
D) H4XeO6(aq)
E) Cl-(aq)

F) A) and B)
G) A) and C)

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Consider the following balanced redox reaction. Mn2+(aq) + S2O82-(aq) + 2H2O(l) → MnO2(s) + 4H+(aq) + 2SO42-(aq) Which of the following statements is true?


A) Mn2+(aq) is the oxidizing agent and is reduced.
B) Mn2+ (aq) is the oxidizing agent and is oxidized.
C) Mn2+ (aq) is the reducing agent and is oxidized.
D) Mn2+ (aq) is the reducing agent and is reduced.
E) Manganese does not change its oxidation number in this reaction.

F) B) and C)
G) A) and B)

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What mass of Cu may be deposited from a Cu2+ solution during electrolysis by a current of 3.00 A for 10.0 hours?


A) 63.6 g Cu
B) 35.6 g Cu
C) 6.4 g Cu
D) 3.6 g Cu
E) 71.2 g Cu

F) B) and E)
G) D) and E)

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Consider the reaction CuO(s) + H2(g) → Cu(s) + H2O(l) In this reaction,which substances are the oxidizing agent and reducing agent, Respectively?


A) CuO and H2
B) H2 and CuO
C) CuO and Cu
D) H2O and H2
E) Cu and H2O

F) C) and E)
G) C) and D)

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Complete and balance the following redox equation.Now sum the coefficients of all species in the balanced equation.(Remember to add the coefficients that are equal to one,and to add the coefficients of any species added to the equation.) The sum of the smallest whole number coefficients is Bi(OH) 3 + SnO22- → Bi + SnO32- (basic solution)


A) 32
B) 25
C) 16
D) 13
E) 4

F) A) and E)
G) B) and E)

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Lithium-ion batteries can be recharged many times.

A) True
B) False

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The redox reaction of peroxydisulfate with iodide has been used for many years as part of the iodine clock reaction.If E°cell = 1.587 V and E° of the cathode half-cell is 0.536 V, what is E° of the anode half-cell? S2O82-(aq) + 2H+ + 2I-(aq) → 2HSO4-(aq) + I2(aq)


A) -1.051 V
B) -2.123 V
C) 1.051 V
D) 2.123 V
E) None of these choices is correct.

F) A) and B)
G) A) and C)

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Which is the correct cell diagram for the following electrochemical cell? Which is the correct cell diagram for the following electrochemical cell?   Half-Reaction E° (V)  Sn<sup>2+</sup>(aq) + 2e<sup>-</sup> →Sn(s) -0.14 Fe<sup>2+</sup>(aq) + 2e<sup>-</sup> →Fe(s) -0.44 A) Sn(s) | Sn<sup>2+</sup>(aq,1.0 M) || Fe<sup>2+</sup>(aq,1.0 M) | Fe(s)  B) Sn(s) | Fe<sup>2+</sup>(aq,1.0 M) || Sn<sup>2+</sup>(aq,1.0 M) | Fe(s)  C) Fe(s) | Sn<sup>2+</sup>(aq,1.0 M) || Fe<sup>2+</sup>(aq,1.0 M) | Sn(s)  D) Fe(s) | Fe<sup>2+</sup>(aq,1.0 M) || Sn<sup>2+</sup>(aq,1.0 M) | Sn(s)  E) Sn(s) | Fe(s) || Sn<sup>2+</sup>(aq,1.0 M) | Fe<sup>2+</sup>(aq,1.0 M) Half-Reaction E° (V) Sn2+(aq) + 2e- →Sn(s) -0.14 Fe2+(aq) + 2e- →Fe(s) -0.44


A) Sn(s) | Sn2+(aq,1.0 M) || Fe2+(aq,1.0 M) | Fe(s)
B) Sn(s) | Fe2+(aq,1.0 M) || Sn2+(aq,1.0 M) | Fe(s)
C) Fe(s) | Sn2+(aq,1.0 M) || Fe2+(aq,1.0 M) | Sn(s)
D) Fe(s) | Fe2+(aq,1.0 M) || Sn2+(aq,1.0 M) | Sn(s)
E) Sn(s) | Fe(s) || Sn2+(aq,1.0 M) | Fe2+(aq,1.0 M)

F) A) and E)
G) B) and E)

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When the following redox equation is balanced with the smallest whole number coefficients,what is the coefficient of Sb3+(aq) ? BrO3-(aq) + Sb3+(aq) → Br-(aq) + Sb5+(aq) (acidic solution)


A) 1
B) 2
C) 3
D) 4
E) 6

F) All of the above
G) B) and E)

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What is E°cell for the following reaction? 2Au(s) + 3Ca2+(aq) → 2Au3+(aq) + 3Ca(s) Au3+(aq) + 3e- → Au(s) E° = 1.50 V Ca2+ (aq) + 2e- → Ca(s) E° = -2.87 V


A) -4.37 V
B) -1.37 V
C) -11.6 V
D) 1.37 V
E) 4.37 V

F) A) and E)
G) D) and E)

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Which equation is correct?


A) E°cell = E°anode - E°cathode
B) E°cell = E°cathode + E°anode
C) E°cell = E°cathode - E°anode
D) E°cell = E°cathode / E°anode

E) B) and C)
F) A) and D)

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What is E°cell for the reaction of nickel(II) ions with cadmium metal at 25°C? (R = 8.314 J/K • mol,F = 96,500 C • mol-1) Ni2+(aq) + Cd(s) What is E°<sub>cell</sub> for the reaction of nickel(II) ions with cadmium metal at 25°C? (R = 8.314 J/K • mol,F = 96,500 C • mol<sup>-1</sup>)  Ni<sup>2+</sup>(aq) + Cd(s)    Cd<sup>2+</sup>(aq) + Ni(s) K = 1.17 × 10<sup>5</sup> A) 0.0750 V B) 0.100 V C) 0.120 V D) 0.150 V E) 0.300 V Cd2+(aq) + Ni(s) K = 1.17 × 105


A) 0.0750 V
B) 0.100 V
C) 0.120 V
D) 0.150 V
E) 0.300 V

F) C) and D)
G) A) and C)

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Two cells are connected in series,so that the same current flows through two electrodes,where the following half-reactions occur: Cu2+(aq) + 2e- → Cu(s) and Ag+(aq) + e- → Ag(s) For every 1.00 g of copper produced in the first process,how many grams of silver will be produced in the second one?


A) 0.294 g Ag
B) 0.588 g Ag
C) 0.850 g Ag
D) 1.70 g Ag
E) 3.40 g Ag

F) B) and D)
G) B) and C)

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What is the purpose of a salt bridge in an electrochemical cell?


A) A salt bridge provides electrical contact between the electrodes that make up the cell.
B) A salt bridge carries electrons between the cathode and anode.
C) A salt bridge insulates the two electrodes.
D) A salt bridge allows the electrolyte solution to siphon from one side of the cell to the other so the levels remain equal.
E) A salt bridge allows electrolyte to flow from one half-cell to the other in order to maintain electroneutrality.

F) D) and E)
G) C) and D)

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A voltaic cell is prepared using copper and silver.Its cell notation is shown below. Cu(s) | Cu2+(aq) || Ag+(aq) | Ag(s) Which reaction occurs at the cathode?


A) Cu(s) → Cu2+(aq) + 2e-
B) Cu2+(aq) + 2e- → Cu(s)
C) Ag(s) → Ag+(aq) + e-
D) Ag+(aq) + e- → Ag(s)
E) Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)

F) None of the above
G) C) and D)

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