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If the standard reduction potential of Zn is -0.76 V, which of the following statements about a cell whose half-cells are Zn2+/Zn and SHE is correct?


A) SHE will be the cell's cathode, Zn(s) will be the cell's anode, and the measured cell potential will be 0.76 V.
B) SHE will be the cell's anode, Zn(s) will be the cell's cathode, and the measured cell potential will be 0.76 V.
C) SHE will be the cell's cathode, Zn(s) will be the cell's anode, and the measured cell potential will be -0.76 V.
D) SHE will be the cell's cathode, Zn2+(aq) will be the cell's anode, and the measured cell potential will be 0.76 V.
E) H+(aq) will be the cell's cathode, Zn2+(aq) will be the cell's anode, and the measured cell potential will be 0.76 V.

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

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Which of the following is TRUE about standard electrode potentials?


A) E°cell is negative for spontaneous reactions.
B) Electrons will flow from a more positive electrode to a more negative electrode.
C) The electrode potential of the standard hydrogen electrode is exactly zero.
D) E°cell is the sum in voltage between the anode and the cathode.
E) The electrode in any half-cell with a greater tendency to undergo reduction is negatively charged relative to the standard hydrogen electrode and therefore has E° < 0.

F) A) and B)
G) A) and D)

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Why, if we multiply a reaction by 2, don't we multiply its E°red by 2?

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Half-cell potentials (E°)are a...

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Use the provided reduction potentials to calculate ΔrG° for the following redox reaction: 2Al(s) + 3Mg2+(aq) → 2Al3+(aq) + 3Mg(s) E°(Al3+/Al) = -1.66 V and E°(Mg2+/Mg) = -2.37 V


A) +4.1 × 102 kJ mol-1
B) +1.4 × 102 kJ mol-1
C) -2.3 × 102 kJ mol-1
D) -7.8 × 102 kJ mol-1
E) +6.8 × 102 kJ mol-1

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

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The standard cell potential (E°) of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g) With The standard cell potential (E°) of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn(s) + 2H<sup>+</sup>(aq) → Zn<sup>2+</sup>(aq) + H<sub>2</sub>(g)  With   = 1.0 atm and [Zn<sup>2+</sup>] = 1.0 mol L<sup>-1</sup>, the cell potential is 0.66 V. The concentration of H<sup>+</sup> in the cathode compartment is ________ mol L<sup>-1</sup>. A) 2.0 × 10<sup>-2</sup> B) 4.2 × 10<sup>-4</sup> C) 1.4 × 10<sup>-1</sup> D) 4.9 × 10<sup>1</sup> E) 1.0 × 10<sup>-12</sup> = 1.0 atm and [Zn2+] = 1.0 mol L-1, the cell potential is 0.66 V. The concentration of H+ in the cathode compartment is ________ mol L-1.


A) 2.0 × 10-2
B) 4.2 × 10-4
C) 1.4 × 10-1
D) 4.9 × 101
E) 1.0 × 10-12

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

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Predict the species that will be oxidized first if a mixture of molten salts containing the following ions undergoes electrolysis: Cu2+, Mg2+, Cl⁻, Br⁻, F⁻


A) Cl⁻
B) F⁻
C) Cu2+
D) Mg2+
E) Br⁻

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

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What is undergoing reduction in the redox reaction represented by the following cell notation? Pb(s) ∣ Pb2+(aq) What is undergoing reduction in the redox reaction represented by the following cell notation? Pb(s) ∣ Pb<sup>2+</sup>(aq)    H<sup>+</sup>(aq) ∣ H<sub>2</sub>(g) ∣ Pt(s)  A) H<sub>2</sub>(g)  B) H<sup>+</sup>(aq)  C) Pb<sup>2+</sup>(aq)  D) Pb(s)  E) Pt(s) H+(aq) ∣ H2(g) ∣ Pt(s)


A) H2(g)
B) H+(aq)
C) Pb2+(aq)
D) Pb(s)
E) Pt(s)

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

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Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25 °C: Sn(s) ∣ Sn2+(aq, 1.8 mol L-1) Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25 °C: Sn(s) ∣ Sn<sup>2+</sup>(aq, 1.8 mol L<sup>-1</sup>)    Ag<sup>+</sup>(aq, 0.055 mol L<sup>-1</sup>) ∣ Ag(s)  E°(Sn<sup>2+</sup>/Sn) = -0.14 V and E°(Ag<sup>+</sup>/Ag) = +0.80 V A) -0.94 V B) -0.85 V C) +1.02 V D) +0.98 V E) +0.86 V Ag+(aq, 0.055 mol L-1) ∣ Ag(s) E°(Sn2+/Sn) = -0.14 V and E°(Ag+/Ag) = +0.80 V


A) -0.94 V
B) -0.85 V
C) +1.02 V
D) +0.98 V
E) +0.86 V

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

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What is electrolysis?

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An electrical curren...

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Using the following standard reduction potentials, Fe3+(aq) + e- →Fe2+(aq) E° = +0.77 V Ni2+(aq) + 2 e- →Ni(s) E° = -0.23 V Calculate the standard cell potential for the galvanic cell reaction given below and determine whether or not this reaction is spontaneous under standard conditions. Ni2+(aq) + 2Fe2+(aq) → 2Fe3+(aq) + Ni(s)


A) E° = -1.00 V, nonspontaneous
B) E° = -1.00 V, spontaneous
C) E° = +1.00 V, nonspontaneous
D) E° = +1.00 V, spontaneous

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

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How many electrons are transferred in the following reaction? (The reaction is unbalanced.) I2(s) + Fe(s) → Fe3+(aq) + I⁻(aq)


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

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

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Match the following. -ΔrG° < 0


A) E°cell < 0
B) Ecell < 0
C) E°cell > 0
D) Ecell > 0
E) Ecell = 0
F) Ecell = E°cell

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

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Which of the following is the strongest oxidizing agent?


A) Br2(l)
B) Au3+(aq)
C) Ag(s)
D) Br⁻(aq)
E) Au(s)

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

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What is the reduction half-reaction for the following overall galvanic cell reaction? Co2+(aq) + 2Ag(s) → Co(s) + 2 Ag+(aq)


A) Ag(s) + e- → Ag+(aq)
B) Ag+(aq) + e- → Ag(s)
C) Co2+(aq) + 2 e- → Co(s)
D) Co2+(aq) + e- → Co(s)

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

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Sketch a voltaic cell that contains the following half reactions and label all relevant components. Zn2+(aq)+ 2e⁻ → Zn(s) E°= -0.76 V Cu2+(aq)+ 2e⁻ → Cu(s) E°= +0.34 V

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The sketch...

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Balance the following redox reaction if it occurs in basic solution. What are the coefficients in front of Cr(OH) 4 and ClO⁻ in the balanced reaction? Cr(OH) 4⁻(aq) + ClO⁻(aq) → CrO42-(aq) + Cl⁻(aq)


A) Cr(OH) 4⁻ = 2, ClO⁻ = 3
B) Cr(OH) 4⁻ = 1, ClO⁻ = 1
C) Cr(OH) 4⁻ = 1, ClO⁻ = 2
D) Cr(OH) 4⁻ = 2, ClO⁻ = 6
E) Cr(OH) 4⁻ = 6, ClO⁻ = 5

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

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Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn2+(aq) + 2Ag(s)


A) Ag+(aq) ∣ Ag(s) Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn<sup>2+</sup>(aq) + 2Ag(s)  A) Ag<sup>+</sup>(aq) ∣ Ag(s)    Sn(s) ∣ Sn<sup>2+</sup>(aq)  B) Ag(s) ∣ Ag<sup>+</sup>(aq)    Sn<sup>2+</sup>(aq) ∣ Sn(s)  C) Sn(s) ∣ Sn<sup>2+</sup>(aq)    Ag<sup>+</sup>(aq) ∣ Ag(s)  D) Sn<sup>2+</sup>(aq) ∣ Sn(s)    Ag(s) ∣ Ag<sup>+</sup>(aq)  E) Sn(s) ∣ Ag(s)    Sn<sup>2+</sup>(aq) ∣ Ag<sup>+</sup>(aq) Sn(s) ∣ Sn2+(aq)
B) Ag(s) ∣ Ag+(aq) Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn<sup>2+</sup>(aq) + 2Ag(s)  A) Ag<sup>+</sup>(aq) ∣ Ag(s)    Sn(s) ∣ Sn<sup>2+</sup>(aq)  B) Ag(s) ∣ Ag<sup>+</sup>(aq)    Sn<sup>2+</sup>(aq) ∣ Sn(s)  C) Sn(s) ∣ Sn<sup>2+</sup>(aq)    Ag<sup>+</sup>(aq) ∣ Ag(s)  D) Sn<sup>2+</sup>(aq) ∣ Sn(s)    Ag(s) ∣ Ag<sup>+</sup>(aq)  E) Sn(s) ∣ Ag(s)    Sn<sup>2+</sup>(aq) ∣ Ag<sup>+</sup>(aq) Sn2+(aq) ∣ Sn(s)
C) Sn(s) ∣ Sn2+(aq) Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn<sup>2+</sup>(aq) + 2Ag(s)  A) Ag<sup>+</sup>(aq) ∣ Ag(s)    Sn(s) ∣ Sn<sup>2+</sup>(aq)  B) Ag(s) ∣ Ag<sup>+</sup>(aq)    Sn<sup>2+</sup>(aq) ∣ Sn(s)  C) Sn(s) ∣ Sn<sup>2+</sup>(aq)    Ag<sup>+</sup>(aq) ∣ Ag(s)  D) Sn<sup>2+</sup>(aq) ∣ Sn(s)    Ag(s) ∣ Ag<sup>+</sup>(aq)  E) Sn(s) ∣ Ag(s)    Sn<sup>2+</sup>(aq) ∣ Ag<sup>+</sup>(aq) Ag+(aq) ∣ Ag(s)
D) Sn2+(aq) ∣ Sn(s) Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn<sup>2+</sup>(aq) + 2Ag(s)  A) Ag<sup>+</sup>(aq) ∣ Ag(s)    Sn(s) ∣ Sn<sup>2+</sup>(aq)  B) Ag(s) ∣ Ag<sup>+</sup>(aq)    Sn<sup>2+</sup>(aq) ∣ Sn(s)  C) Sn(s) ∣ Sn<sup>2+</sup>(aq)    Ag<sup>+</sup>(aq) ∣ Ag(s)  D) Sn<sup>2+</sup>(aq) ∣ Sn(s)    Ag(s) ∣ Ag<sup>+</sup>(aq)  E) Sn(s) ∣ Ag(s)    Sn<sup>2+</sup>(aq) ∣ Ag<sup>+</sup>(aq) Ag(s) ∣ Ag+(aq)
E) Sn(s) ∣ Ag(s) Determine the cell notation for the redox reaction given below: Sn(s) + 2Ag⁺(aq) → Sn<sup>2+</sup>(aq) + 2Ag(s)  A) Ag<sup>+</sup>(aq) ∣ Ag(s)    Sn(s) ∣ Sn<sup>2+</sup>(aq)  B) Ag(s) ∣ Ag<sup>+</sup>(aq)    Sn<sup>2+</sup>(aq) ∣ Sn(s)  C) Sn(s) ∣ Sn<sup>2+</sup>(aq)    Ag<sup>+</sup>(aq) ∣ Ag(s)  D) Sn<sup>2+</sup>(aq) ∣ Sn(s)    Ag(s) ∣ Ag<sup>+</sup>(aq)  E) Sn(s) ∣ Ag(s)    Sn<sup>2+</sup>(aq) ∣ Ag<sup>+</sup>(aq) Sn2+(aq) ∣ Ag+(aq)

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

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What element is being oxidized in the following (unbalanced) redox reaction? Zn2+(aq) + NH4+(aq) → Zn(s) + NO3⁻(aq)


A) Zn
B) N
C) H
D) O

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

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Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25 °: Cu(s) ∣ Cu2+(aq, 0.0032 mol L-1) Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25 °: Cu(s) ∣ Cu<sup>2+</sup>(aq, 0.0032 mol L<sup>-1</sup>)    Cu<sup>2+</sup>(aq, 4.48 mol L<sup>-1</sup>) ∣ Cu(s)  E°(Cu<sup>2+</sup>/Cu) = +0.34 V A) 0.00 V B) +0.093 V C) +0.34 V D) +0.186 V E) +0.052 V Cu2+(aq, 4.48 mol L-1) ∣ Cu(s) E°(Cu2+/Cu) = +0.34 V


A) 0.00 V
B) +0.093 V
C) +0.34 V
D) +0.186 V
E) +0.052 V

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

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Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of Zn and H+ in the balanced reaction? Zn2+(aq) + NH4+(aq) → Zn(s) + NO3⁻(aq)


A) Zn = 1, H⁺ = 8
B) Zn = 1, H⁺ = 4
C) Zn = 4, H⁺ = 10
D) Zn = 2, H⁺ = 4
E) Zn = 3, H⁺ = 5

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

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