Based on the balanced chemical equation shown below,determine the mass percent of Fe3+ in a 0.6450 gram sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl2(aq),solution is required to completely react with the Fe3+ present in the ore sample.The chemical equation for the reaction is: 2 Fe3+(aq)+ Sn2+(aq)→ 2 Fe2+(aq)+ Sn4+(aq).

A) 6.196% B) 9.697% C) 19.40% D) 38.79% A) 6.196% B) 9.697% C) 19.40% D) 38.79%

Calculate the cell potential at 25°C for the cell Fe(s)∣ (Fe2+(0.100 M)∣∣ Pd2+(1.0 × 10-5 M)∣ Pd(s) Given that the standard reduction potential for Fe2+/Fe is -0.45 V and for Pd2+/Pd is +0.95 V.

A) +1.16 V B) +1.28 V C) +1.52 V D) +1.68 V A) +1.16 V B) +1.28 V C) +1.52 V D) +1.68 V

In a galvanic cell constructed from Pb(s)| Pb+2(aq)|| Hg+1 | Hg(s),which of the electrodes will gain mass?

A) the anode,Pb (s) B) the cathode,Pb (s) C) the anode,Hg (s) D) the cathode,Hg (s) A) the anode,Pb (s) B) the cathode,Pb (s) C) the anode,Hg (s) D) the cathode,Hg (s)

Shown below are the reactions occurring in the proton-exchange membrane (PEM)fuel cell. I.2 H2(g)→ 4 H+(aq)+ 4 e- II.O2(g)+ 4 H+(aq)+ 4 e- → 2 H2O(l) Overall 2 H2(g)+ O2(g)→ 2 H2O(l) Which is the cathode reaction,and what is being oxidized in the overall reaction?

A) I,H2 B) I,O2 C) II,H2 D) II,O2 A) I,H2 B) I,O2 C) II,H2 D) II,O2

Exam 18: Electrochemistry

Consider the following cell: Pt(s)∣ H₂(g,p₁)∣ H⁺(aq,pH_A)∣∣ H⁺(aq,pH_C)∣ H₂(g,p₂)∣ Pt(s) Where pH_A is the pH of the aqueous solution in the anode half-cell and pH_C is the pH of the aqueous solution in the cathode half-cell.If the partial pressure of H₂(g)is the same for both half-cells, (p₁ = p₂),then E for the cell at 25°C is

(Multiple Choice)

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Question 101

A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→ Mg²⁺(aq)+ Pb(s). Mg(s)→ Mg²⁺(aq)+ 2 e^-is the half-reaction,which occurs at the .

(Short Answer)

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Question 102

Electrolysis of a metal nitrate solution M(NO₃)₂(aq)for 3.00 hours with a constant current of 20.0 A gives 119 g of the metal M.The identity of the metal M in the metal ion M²⁺ is ________.

(Short Answer)

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Question 103

For the hypothetical reaction A + 2 B^x → A^y + 2 B,E° = 1.50 V = and ΔG° = -305 kJ.For this reaction,if the value of x is 4,then the value of y = .

(Multiple Choice)

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Question 104

What is the shorthand notation for this cell?

(Multiple Choice)

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Question 105

A galvanic cell consists of a La³⁺/La half-cell and a standard hydrogen electrode.If the La³⁺/La half-cell standard cell functions as the anode,and the standard cell potential is 2.52 V,what is the standard reduction potential for the La³⁺/La half-cell?

(Multiple Choice)

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Question 106

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq)+ Cl₂(g)→ 2 Fe³⁺(aq)+ 2 Cl^-(aq)

(Multiple Choice)

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Question 107

What is true when the following equation is balanced in basic solution? P(s)+ PO₄^3-(aq)→ HPO₃^2-(aq)

(Multiple Choice)

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Question 108

Based on the balanced chemical equation shown below,determine the mass percent of Fe³⁺ in a 0.6450 gram sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl₂(aq),solution is required to completely react with the Fe³⁺ present in the ore sample.The chemical equation for the reaction is: 2 Fe³⁺(aq)+ Sn²⁺(aq)→ 2 Fe²⁺(aq)+ Sn⁴⁺(aq).

(Multiple Choice)

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Question 109

What is the relation between joules (J),volts (V),and coulombs (C)?

(Multiple Choice)

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Question 110

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Cu(s)∣ Cu²⁺(aq)∣∣ Cl₂(g)∣ Cl^-(aq)∣ C(s)

(Multiple Choice)

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Question 111

If the concentrations of Ag⁺(aq)and Cu²⁺(aq)are varied in this galvanic cell,which of the following four cells has the largest cell potential?

(Multiple Choice)

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Question 112

Consider the galvanic cell shown below. -What is the balanced equation for the cell reaction?

(Multiple Choice)

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Question 113

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Fe²⁺⁽^aq)+ 2 Al(s)→ 3 Fe(s)+ 2 Al³⁺(aq)

(Multiple Choice)

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Question 114

Calculate the cell potential at 25°C for the cell Fe(s)∣ (Fe²⁺(0.100 M)∣∣ Pd²⁺(1.0 × 10^-5 M)∣ Pd(s) Given that the standard reduction potential for Fe²⁺/Fe is -0.45 V and for Pd²⁺/Pd is +0.95 V.

(Multiple Choice)

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Question 115

In a galvanic cell constructed from Pb(s)| Pb⁺²(aq)|| Hg⁺¹| Hg(s),which of the electrodes will gain mass?

(Multiple Choice)

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Question 116

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Ni²⁺(aq)∣ Ni(s)

(Multiple Choice)

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Question 117

-For the galvanic cell shown above,in what direction should the anions and cations in half-cell A move?

(Multiple Choice)

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Question 118

Shown below are the reactions occurring in the proton-exchange membrane (PEM)fuel cell. I.2 H₂(g)→ 4 H⁺(aq)+ 4 e^- II.O₂(g)+ 4 H⁺(aq)+ 4 e^- → 2 H₂O(l) Overall 2 H₂(g)+ O₂(g)→ 2 H₂O(l) Which is the cathode reaction,and what is being oxidized in the overall reaction?

(Multiple Choice)

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Question 119

A particular 12V battery is based on a reaction having a standard cell potential,E° = +1.92 V.What happens when the battery "dies"?

(Multiple Choice)

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Question 120

Showing 101 - 120 of 212

Exam 18: Electrochemistry

A galvanic cell uses the reaction Mg(s)+ Pb2+(aq)→ Mg2+(aq)+ Pb(s). Mg(s)→ Mg2+(aq)+ 2 e- is the ________ half-reaction,which occurs at the ________.

Electrolysis of a metal nitrate solution M(NO3)2(aq)for 3.00 hours with a constant current of 20.0 A gives 119 g of the metal M.The identity of the metal M in the metal ion M2+ is ________.

For the hypothetical reaction A + 2 Bx → Ay + 2 B,E° = 1.50 V = and ΔG° = -305 kJ.For this reaction,if the value of x is 4,then the value of y = .

What is the shorthand notation for this cell?

A galvanic cell consists of a La3+/La half-cell and a standard hydrogen electrode.If the La3+/La half-cell standard cell functions as the anode,and the standard cell potential is 2.52 V,what is the standard reduction potential for the La3+/La half-cell?

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe2+(aq)+ Cl2(g)→ 2 Fe3+(aq)+ 2 Cl-(aq)

What is true when the following equation is balanced in basic solution? P(s)+ PO43-(aq)→ HPO32-(aq)

What is the relation between joules (J),volts (V),and coulombs (C)?

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Cu(s)∣ Cu2+(aq)∣∣ Cl2(g)∣ Cl-(aq)∣ C(s)

If the concentrations of Ag+(aq)and Cu2+(aq)are varied in this galvanic cell,which of the following four cells has the largest cell potential?

Consider the galvanic cell shown below. -What is the balanced equation for the cell reaction?

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Fe2+(aq)+ 2 Al(s)→ 3 Fe(s)+ 2 Al3+(aq)

Calculate the cell potential at 25°C for the cell Fe(s)∣ (Fe2+(0.100 M)∣∣ Pd2+(1.0 × 10-5 M)∣ Pd(s) Given that the standard reduction potential for Fe2+/Fe is -0.45 V and for Pd2+/Pd is +0.95 V.

In a galvanic cell constructed from Pb(s)| Pb+2(aq)|| Hg+1 | Hg(s),which of the electrodes will gain mass?

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al3+(aq)∣∣ Ni2+(aq)∣ Ni(s)

-For the galvanic cell shown above,in what direction should the anions and cations in half-cell A move?

Shown below are the reactions occurring in the proton-exchange membrane (PEM)fuel cell. I.2 H2(g)→ 4 H+(aq)+ 4 e- II.O2(g)+ 4 H+(aq)+ 4 e- → 2 H2O(l) Overall 2 H2(g)+ O2(g)→ 2 H2O(l) Which is the cathode reaction,and what is being oxidized in the overall reaction?

A particular 12V battery is based on a reaction having a standard cell potential,E° = +1.92 V.What happens when the battery "dies"?

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A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→ Mg²⁺(aq)+ Pb(s). Mg(s)→ Mg²⁺(aq)+ 2 e^-is the half-reaction,which occurs at the .

Electrolysis of a metal nitrate solution M(NO₃)₂(aq)for 3.00 hours with a constant current of 20.0 A gives 119 g of the metal M.The identity of the metal M in the metal ion M²⁺ is ________.

For the hypothetical reaction A + 2 B^x → A^y + 2 B,E° = 1.50 V = and ΔG° = -305 kJ.For this reaction,if the value of x is 4,then the value of y = .

A galvanic cell consists of a La³⁺/La half-cell and a standard hydrogen electrode.If the La³⁺/La half-cell standard cell functions as the anode,and the standard cell potential is 2.52 V,what is the standard reduction potential for the La³⁺/La half-cell?

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq)+ Cl₂(g)→ 2 Fe³⁺(aq)+ 2 Cl^-(aq)

What is true when the following equation is balanced in basic solution? P(s)+ PO₄^3-(aq)→ HPO₃^2-(aq)

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Cu(s)∣ Cu²⁺(aq)∣∣ Cl₂(g)∣ Cl^-(aq)∣ C(s)

If the concentrations of Ag⁺(aq)and Cu²⁺(aq)are varied in this galvanic cell,which of the following four cells has the largest cell potential?

In the relationship ΔG = -nFE°,what is the value of n for the reaction shown below? 3 Fe²⁺⁽^aq)+ 2 Al(s)→ 3 Fe(s)+ 2 Al³⁺(aq)

Calculate the cell potential at 25°C for the cell Fe(s)∣ (Fe²⁺(0.100 M)∣∣ Pd²⁺(1.0 × 10^-5 M)∣ Pd(s) Given that the standard reduction potential for Fe²⁺/Fe is -0.45 V and for Pd²⁺/Pd is +0.95 V.

In a galvanic cell constructed from Pb(s)| Pb⁺²(aq)|| Hg⁺¹| Hg(s),which of the electrodes will gain mass?

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Ni²⁺(aq)∣ Ni(s)

Shown below are the reactions occurring in the proton-exchange membrane (PEM)fuel cell. I.2 H₂(g)→ 4 H⁺(aq)+ 4 e^- II.O₂(g)+ 4 H⁺(aq)+ 4 e^- → 2 H₂O(l) Overall 2 H₂(g)+ O₂(g)→ 2 H₂O(l) Which is the cathode reaction,and what is being oxidized in the overall reaction?