Based on the balanced chemical equation shown below,determine the mass percent of Fe3+ in a 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) 8.982% B) 14.06% C) 28.11% D) 56.22% A) 8.982% B) 14.06% C) 28.11% D) 56.22%

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Pb(s)and Pb2+(aq).What species are produced at the electrodes under standard conditions? Ag+(aq)+ e- → Ag(s)E° = +0.80 V Pb2+(aq)+ 2 e- → Pb(s)E° = -0.13 V

A) Ag(aq)is formed at the cathode and,Pb(s)is formed at the anode. B) Ag(s)is formed at the cathode,and Pb2+(aq)is formed at the anode. C) Pb(s)is formed at the cathode,and Ag+(aq)is formed at the anode. D) Pb2+(aq)is formed at the cathode,and Cu(s)is formed at the anode. A) Ag(aq)is formed at the cathode and,Pb(s)is formed at the anode. B) Ag(s)is formed at the cathode,and Pb2+(aq)is formed at the anode. C) Pb(s)is formed at the cathode,and Ag+(aq)is formed at the anode. D) Pb2+(aq)is formed at the cathode,and Cu(s)is formed at the anode.

-The cell reaction 2 Fe3+(aq)+ Zn(s)→ Zn2+(aq)+ 2 Fe2+(aq)occurs in the galvanic cell shown above.Where should the Fe3+(aq)and Fe2+(aq)be found?

A) Half-cell ( A) contains Fe3+(aq)and half-cell ( B) contains Fe2+(aq). B) Half-cell ( A) contains Fe2+(aq)and half-cell ( B) contains Fe3+(aq). C) Half-cell ( A) contains Fe3+(aq)and Fe2+(aq). D) Half-cell ( B) contains Fe3+(aq)and Fe2+(aq). A) Half-cell ( A) contains Fe3+(aq)and half-cell ( B) contains Fe2+(aq). B) Half-cell ( A) contains Fe2+(aq)and half-cell ( B) contains Fe3+(aq). C) Half-cell ( A) contains Fe3+(aq)and Fe2+(aq). D) Half-cell ( B) contains Fe3+(aq)and Fe2+(aq).

According to the balanced equation shown below,1.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate ion,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ 2 Mn2+(aq)+ 8 H2O(l)

A) 0.400 B) 1.00 C) 2.00 D) 2.25 A) 0.400 B) 1.00 C) 2.00 D) 2.25

For the reaction 2 Al(s)+ 3 Co2+(aq)→ 2 Al3+(aq)+ 3 Co(s),ΔG° is -799 kJ.What is E° for a standard cell based on this reaction?

A) +1.38 V B) +2.76 V C) +4.14 V D) +8.28 V A) +1.38 V B) +2.76 V C) +4.14 V D) +8.28 V

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq),is needed to completely react with 12.44 mL of 0.125 M KI3(aq)? 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq)

A) 3.11 mL B) 6.22 mL C) 12.4 mL D) 49.8 mL A) 3.11 mL B) 6.22 mL C) 12.4 mL D) 49.8 mL

For a particular cell based on the reaction: 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al3+(aq)+ 3 Cl-(aq) E = +1.750 V and E° = +1.884 V at 25°C. What is the value of the equilibrium constant,K,at 25°C for the reaction?

A) 3.6 × 1029 B) 6.7 × 1031 C) 4.8 × 1088 D) 3.0 × 1095 A) 3.6 × 1029 B) 6.7 × 1031 C) 4.8 × 1088 D) 3.0 × 1095

Shown below are the reactions occurring in the direct methanol fuel cell (DMFC). I.2 CH3OH(aq)+ 2 H2O(l)→ 2 CO2(g)+12 H+(aq)+12 e- II.3 O2(g)+ 12 H+(aq)+ 12 e- → 6 H2O(l) Overall 2 CH3OH(aq)+ 3 O2(g)→ 2 CO2(g)+ 4 H2O(l) Which is the anode reaction,and what is being oxidized in the overall reaction?

A) I,CH3OH B) I,H2O C) II,O2 D) II,H+ A) I,CH3OH B) I,H2O C) II,O2 D) II,H+

The nickel-cadmium battery cell has a standard potential of +1.20 V.The cell reaction is 2 NiO(OH)(s)+ Cd(s)+ 2 H2O(l)→ 2 Ni(OH)2(s)+ Cd(OH)2(s). What is the standard free energy change for this reaction?

A) -38.7 kJ B) -116 kJ C) -232 kJ D) -463 kJ A) -38.7 kJ B) -116 kJ C) -232 kJ D) -463 kJ

What are the coefficients in front of IO3-(aq)and I-(aq)when the following equation is balanced in an acidic solution? ________ IO3-(aq)+ ________ I-(aq)→ ________ I2(aq)

A) 1,3 B) 1,5 C) 2,3 D) 2,5 A) 1,3 B) 1,5 C) 2,3 D) 2,5

Exam 18: Electrochemistry

Based on the balanced chemical equation shown below,determine the mass percent of Fe³⁺ in a sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl₂(aq),solution is required to completely react with theFe³⁺ 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 21

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Pb(s)and Pb²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Pb²⁺(aq)+ 2 e^- → Pb(s)E° = -0.13 V

(Multiple Choice)

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Question 22

In the shorthand notation for a galvanic cell,a double vertical line (∣∣)represents

(Multiple Choice)

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Question 23

-The cell reaction 2 Fe³⁺(aq)+ Zn(s)→ Zn²⁺(aq)+ 2 Fe²⁺(aq)occurs in the galvanic cell shown above.Where should the Fe³⁺(aq)and Fe²⁺(aq)be found?

(Multiple Choice)

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Question 24

What is the shorthand notation that represents the following galvanic cell reaction? Fe(s)+ Cu(NO₃)₂(aq)→ Fe(NO₃)₂(aq)+ Cu(s)

(Multiple Choice)

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Question 25

Given and calculate E at 25°C for a cell based on the reaction:

(Multiple Choice)

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Question 26

Identify the anode and cathode half-reactions and categorize each as either oxidation or reduction.

(Multiple Choice)

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Question 27

According to the balanced equation shown below,1.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate ion,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ 2 Mn²⁺(aq)+ 8 H₂O(l)

(Multiple Choice)

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Question 28

The standard cell potential for the following galvanic cell is 0.71 V. Pb(s)|Pb²⁺(aq)||Al³⁺(aq)|Al This reaction has an equilibrium constant,K = ________.

(Short Answer)

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Question 29

For the reaction 2 Al(s)+ 3 Co²⁺(aq)→ 2 Al³⁺(aq)+ 3 Co(s),ΔG° is -799 kJ.What is E° for a standard cell based on this reaction?

(Multiple Choice)

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Question 30

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NiCl₂ for 80.0 minutes?

(Multiple Choice)

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Question 31

Based on the balanced chemical equation shown below,what volume of 0.250 M K₂S₂O₃(aq),is needed to completely react with 12.44 mL of 0.125 M KI₃(aq)? 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)

(Multiple Choice)

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Question 32

Given that Br₂(g)+ 2 e^- → 2 Br^-(aq)is the reduction half-reaction for the overall reaction what is the oxidation half reaction?

(Multiple Choice)

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Question 33

Doubling all the coefficients in the equation for the cell reaction

(Multiple Choice)

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Question 34

For a particular cell based on the reaction: 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al³⁺(aq)+ 3 Cl^-(aq) E = +1.750 V and E° = +1.884 V at 25°C. What is the value of the equilibrium constant,K,at 25°C for the reaction?

(Multiple Choice)

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Question 35

Shown below are the reactions occurring in the direct methanol fuel cell (DMFC). I.2 CH₃OH(aq)+ 2 H₂O(l)→ 2 CO₂(g)+12 H⁺(aq)+12 e^- II.3 O₂(g)+ 12 H⁺(aq)+ 12 e^- → 6 H₂O(l) Overall 2 CH₃OH(aq)+ 3 O₂(g)→ 2 CO₂(g)+ 4 H₂O(l) Which is the anode reaction,and what is being oxidized in the overall reaction?

(Multiple Choice)

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Question 36

The nickel-cadmium battery cell has a standard potential of +1.20 V.The cell reaction is 2 NiO(OH)(s)+ Cd(s)+ 2 H₂O(l)→ 2 Ni(OH)₂(s)+ Cd(OH)₂(s). What is the standard free energy change for this reaction?

(Multiple Choice)

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Question 37

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s)∣ Zn²⁺(aq,0.0100 M)∣∣ Ag⁺(aq,1.10 M)∣ Ag(s)

(Multiple Choice)

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Question 38

What are the coefficients in front of IO₃^-(aq)and I^-(aq)when the following equation is balanced in an acidic solution? IO₃^-(aq)+ I^-(aq)→ I₂(aq)

(Multiple Choice)

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Question 39

When the equation MnO₄^-(aq)+ C₂O₄^2-(aq)→ Mn²⁺(aq)+ CO₂(g)is balanced in acidic solution using the smallest whole numbers,the coefficient in front of the CO₂(g)is ________.

(Short Answer)

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Question 40

Showing 21 - 40 of 212

Exam 18: Electrochemistry

A galvanic cell consists of one half-cell that contains Ag(s)and Ag+(aq),and one half-cell that contains Pb(s)and Pb2+(aq).What species are produced at the electrodes under standard conditions? Ag+(aq)+ e- → Ag(s)E° = +0.80 V Pb2+(aq)+ 2 e- → Pb(s)E° = -0.13 V

In the shorthand notation for a galvanic cell,a double vertical line (∣∣)represents

-The cell reaction 2 Fe3+(aq)+ Zn(s)→ Zn2+(aq)+ 2 Fe2+(aq)occurs in the galvanic cell shown above.Where should the Fe3+(aq)and Fe2+(aq)be found?

What is the shorthand notation that represents the following galvanic cell reaction? Fe(s)+ Cu(NO3)2(aq)→ Fe(NO3)2(aq)+ Cu(s)

Given and calculate E at 25°C for a cell based on the reaction:

Identify the anode and cathode half-reactions and categorize each as either oxidation or reduction.

According to the balanced equation shown below,1.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate ion,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ 2 Mn2+(aq)+ 8 H2O(l)

The standard cell potential for the following galvanic cell is 0.71 V. Pb(s)|Pb2+(aq)||Al3+(aq)|Al This reaction has an equilibrium constant,K = ________.

For the reaction 2 Al(s)+ 3 Co2+(aq)→ 2 Al3+(aq)+ 3 Co(s),ΔG° is -799 kJ.What is E° for a standard cell based on this reaction?

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NiCl2 for 80.0 minutes?

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq),is needed to completely react with 12.44 mL of 0.125 M KI3(aq)? 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq)

Given that Br2(g)+ 2 e- → 2 Br-(aq)is the reduction half-reaction for the overall reaction what is the oxidation half reaction?

Doubling all the coefficients in the equation for the cell reaction

For a particular cell based on the reaction: 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al3+(aq)+ 3 Cl-(aq) E = +1.750 V and E° = +1.884 V at 25°C. What is the value of the equilibrium constant,K,at 25°C for the reaction?

The nickel-cadmium battery cell has a standard potential of +1.20 V.The cell reaction is 2 NiO(OH)(s)+ Cd(s)+ 2 H2O(l)→ 2 Ni(OH)2(s)+ Cd(OH)2(s). What is the standard free energy change for this reaction?

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s)∣ Zn2+(aq,0.0100 M)∣∣ Ag+(aq,1.10 M)∣ Ag(s)

What are the coefficients in front of IO3-(aq)and I-(aq)when the following equation is balanced in an acidic solution? ________ IO3-(aq)+ ________ I-(aq)→ ________ I2(aq)

When the equation MnO4-(aq)+ C2O42-(aq)→ Mn2+(aq)+ CO2(g)is balanced in acidic solution using the smallest whole numbers,the coefficient in front of the CO2(g)is ________.

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A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Pb(s)and Pb²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Pb²⁺(aq)+ 2 e^- → Pb(s)E° = -0.13 V

-The cell reaction 2 Fe³⁺(aq)+ Zn(s)→ Zn²⁺(aq)+ 2 Fe²⁺(aq)occurs in the galvanic cell shown above.Where should the Fe³⁺(aq)and Fe²⁺(aq)be found?

What is the shorthand notation that represents the following galvanic cell reaction? Fe(s)+ Cu(NO₃)₂(aq)→ Fe(NO₃)₂(aq)+ Cu(s)

According to the balanced equation shown below,1.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate ion,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ 2 Mn²⁺(aq)+ 8 H₂O(l)

The standard cell potential for the following galvanic cell is 0.71 V. Pb(s)|Pb²⁺(aq)||Al³⁺(aq)|Al This reaction has an equilibrium constant,K = ________.

For the reaction 2 Al(s)+ 3 Co²⁺(aq)→ 2 Al³⁺(aq)+ 3 Co(s),ΔG° is -799 kJ.What is E° for a standard cell based on this reaction?

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NiCl₂ for 80.0 minutes?

Based on the balanced chemical equation shown below,what volume of 0.250 M K₂S₂O₃(aq),is needed to completely react with 12.44 mL of 0.125 M KI₃(aq)? 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)

Given that Br₂(g)+ 2 e^- → 2 Br^-(aq)is the reduction half-reaction for the overall reaction what is the oxidation half reaction?

For a particular cell based on the reaction: 3 AgCl(s)+ Al(s)→ 3 Ag(s)+ Al³⁺(aq)+ 3 Cl^-(aq) E = +1.750 V and E° = +1.884 V at 25°C. What is the value of the equilibrium constant,K,at 25°C for the reaction?

The nickel-cadmium battery cell has a standard potential of +1.20 V.The cell reaction is 2 NiO(OH)(s)+ Cd(s)+ 2 H₂O(l)→ 2 Ni(OH)₂(s)+ Cd(OH)₂(s). What is the standard free energy change for this reaction?

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s)∣ Zn²⁺(aq,0.0100 M)∣∣ Ag⁺(aq,1.10 M)∣ Ag(s)

What are the coefficients in front of IO₃^-(aq)and I^-(aq)when the following equation is balanced in an acidic solution? IO₃^-(aq)+ I^-(aq)→ I₂(aq)

When the equation MnO₄^-(aq)+ C₂O₄^2-(aq)→ Mn²⁺(aq)+ CO₂(g)is balanced in acidic solution using the smallest whole numbers,the coefficient in front of the CO₂(g)is ________.