Question 1

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 40.0 minutes?

Accepted Answer

A) 3)45 g 
B) 6)15 g 
C) 10.3 g 
D) 31.0 g 
A) 3)45 g 
B) 6)15 g 
C) 10.3 g 
D) 31.0 g

Question 2

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

Accepted Answer

A) Fe(s)+ Sn(s)→ Fe2+(aq)+ Sn2+(aq) 
B) Fe2+(aq)+ Sn2+(aq)→ Fe(s)+ Sn(s) 
C) Fe(s)+ Sn2+(aq)→ Fe2+(aq)+ Sn(s) 
D) Fe2+(aq)+ Sn(s)→ Fe(s)+ Sn2+(aq) 
A) Fe(s)+ Sn(s)→ Fe2+(aq)+ Sn2+(aq) 
B) Fe2+(aq)+ Sn2+(aq)→ Fe(s)+ Sn(s) 
C) Fe(s)+ Sn2+(aq)→ Fe2+(aq)+ Sn(s) 
D) Fe2+(aq)+ Sn(s)→ Fe(s)+ Sn2+(aq)

Question 3

Consider the following standard reduction potentials,
Ni2+(aq)+ 2 e- → Ni(s)E° = - 0.26 V
I2(s)+ 2 e- → 2 I-(aq)E° = +0.54 V
Under standard conditions,

Accepted Answer

A) Ni2+(aq)is a stronger oxidizing agent than I2(s)and I-(aq)is a stronger reducing agent than Ni(s). 
B) I2(s)is a stronger oxidizing agent than Ni2+(aq)and Ni(s)is a stronger reducing agent than I-(aq). 
C) Ni(s)is a stronger oxidizing agent than I-(aq)and Ni2+(aq)is a stronger reducing agent than I2(s). 
D) I-(aq)is a stronger oxidizing agent than Ni(s)and I2(s)is a stronger reducing agent than Ni2+(aq). 
A) Ni2+(aq)is a stronger oxidizing agent than I2(s)and I-(aq)is a stronger reducing agent than Ni(s). 
B) I2(s)is a stronger oxidizing agent than Ni2+(aq)and Ni(s)is a stronger reducing agent than I-(aq). 
C) Ni(s)is a stronger oxidizing agent than I-(aq)and Ni2+(aq)is a stronger reducing agent than I2(s). 
D) I-(aq)is a stronger oxidizing agent than Ni(s)and I2(s)is a stronger reducing agent than Ni2+(aq).

Question 4

-Is the cell shown above a galvanic or an electrolytic cell? Which is the anode and which is the cathode?

Accepted Answer

A) Electrolytic cell;electrode x is the anode and electrode y is the cathode. 
B) Electrolytic cell;electrode y is the anode and electrode x is the cathode. 
C) Galvanic cell;electrode x is the anode and electrode y is the cathode. 
D) Galvanic cell;electrode y is the anode and electrode x is the cathode. 
A) Electrolytic cell;electrode x is the anode and electrode y is the cathode. 
B) Electrolytic cell;electrode y is the anode and electrode x is the cathode. 
C) Galvanic cell;electrode x is the anode and electrode y is the cathode. 
D) Galvanic cell;electrode y is the anode and electrode x is the cathode.

Question 5

-According to Table 17.1,which aqueous metal ion will reduce Ag+,but not Cu2+?

Accepted Answer

A) Fe2+ 
B) Fe3+ 
C) Mn2+ 
D) Sn2+ 
A) Fe2+ 
B) Fe3+ 
C) Mn2+ 
D) Sn2+

Question 6

In the galvanic cell represented by the shorthand notation below,electrons are lost by ________ and gained by ________.
Pt(s)| Sn2+(aq)| Sn4+(aq)|| Br2(l)|Br-(aq)| Pt(s)

Accepted Answer

Question 7

Which is not true for standard electrode potentials?

Accepted Answer

A) Cell constituents are in their standard states. 
B) E° for oxidation is the negative of E° for reduction. 
C) The half-reactions are written as reductions. 
D) The potential for the standard hydrogen electrode is chosen to be +1.00 V. 
A) Cell constituents are in their standard states. 
B) E° for oxidation is the negative of E° for reduction. 
C) The half-reactions are written as reductions. 
D) The potential for the standard hydrogen electrode is chosen to be +1.00 V.

Question 8

Based on the half-reactions and their respective standard reduction potentials below,the standard cell potential for the reaction that is expected to occur is ________ V.
Ag+(aq)+ e- → Ag(s)0.80 V
2 H+(aq)+ 2 e- → H2(g)0.00 V
Cd2+(aq)+ 2 e- → Cd(s)-0.40 V

Accepted Answer

Question 9

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below?
Al(s)∣ Al3+(aq)∣∣ Fe2+(aq)∣ Fe(s)

Accepted Answer

A) 2 Al(s)+ 3 Fe2+(aq)→ 2 Al3+(aq)+ 3 Fe(s) 
B) 3 Al(s)+ 2 Fe2+(aq)→ 3 Al3+(aq)+ 2 Fe(s) 
C) 2 Fe(s)+ 3 Al3+(aq)→ 2 Fe2+(aq)+ 3 Al(s) 
D) 3 Fe(s)+ 2 Al3+(aq)→ 3 Fe2+(aq)+ 2 Al(s) 
A) 2 Al(s)+ 3 Fe2+(aq)→ 2 Al3+(aq)+ 3 Fe(s) 
B) 3 Al(s)+ 2 Fe2+(aq)→ 3 Al3+(aq)+ 2 Fe(s) 
C) 2 Fe(s)+ 3 Al3+(aq)→ 2 Fe2+(aq)+ 3 Al(s) 
D) 3 Fe(s)+ 2 Al3+(aq)→ 3 Fe2+(aq)+ 2 Al(s)

Question 10

Write the overall cell reaction for the galvanic cell given below.
Pt(s)∣ H2(g)∣ H+(aq)∣∣ Cl2(g)∣ Cl-(aq)∣ Pt(s)

Accepted Answer

A) Pt(s)+ H2(g)+ Cl-(aq)→ Pt(s)+ 2 H+(aq)+ 2 Cl2(g) 
B) 2 H+(aq)+ 2 Cl2(g)→ 2 HCl(aq) 
C) H2(g)+ Cl2(g)→ 2 H+(aq)+ 2 Cl-(aq) 
D) No reaction would occur because there is no salt bridge. 
A) Pt(s)+ H2(g)+ Cl-(aq)→ Pt(s)+ 2 H+(aq)+ 2 Cl2(g) 
B) 2 H+(aq)+ 2 Cl2(g)→ 2 HCl(aq) 
C) H2(g)+ Cl2(g)→ 2 H+(aq)+ 2 Cl-(aq) 
D) No reaction would occur because there is no salt bridge.

Question 11

For the galvanic cell that uses the reaction
2 Al(s)+ 3 Zn2+(aq)→ 2 Al3+(aq)+ 3 Zn(s)
the value of n in the relationship ΔG° = -nFE° is ________.

Accepted Answer

Question 12

What is the Al3+:Ag+concentration ratio in the cell Al(s)| Al3+(aq)∣∣ Ag+(aq)| Ag(s)if the measured cell potential is 2.34 V?

Accepted Answer

A) 0)0094:1 
B) 0)21:1 
C) 4)7:1 
D) 110:1 
A) 0)0094:1 
B) 0)21:1 
C) 4)7:1 
D) 110:1

Question 13

Shown below is a galvanic cell with anode compartment b containing anode a and cathode compartment d containing cathode c.Electrons flow through wire f,ions flow through salt bridge e,and the cell potential is read using voltmeter g.
This galvanic cell uses the reaction: Cu(s)+ 2 AgS1U1P1+S1S1P0(aq) $\rarr$ 2 Ag(s)+ CuS1U1P12+S1S1P0(aq).  
-The initial concentrations of Ag+(aq)and Cu2+(aq)are both 1.0 M.What will happen to the cell voltage if 5.0 M Cu(NO3)2 is added to the compartment containing the 1.0 M Cu2+(aq)? The cell voltage will

Accepted Answer

A) decrease. 
B) increase. 
C) remain the same. 
D) can't tell from the information given 
A) decrease. 
B) increase. 
C) remain the same. 
D) can't tell from the information given

Question 14

A cell based on the reaction below has a standard potential of +0.42 V at 25°C.If all of the species are at standard conditions except [H+],at what pH will the cell have a potential of zero?
H2O2(aq)+ 2 H+(aq)+ 2 Cl-(aq)→ Cl2(aq)+ 2 H2O(l)

Accepted Answer

A) 3)55 
B) 7)09 
C) 10.6 
D) 14.2 
A) 3)55 
B) 7)09 
C) 10.6 
D) 14.2

Question 15

Consider the following cell:
Pt(s)∣ H2(g,p1)∣ H+(aq,pHA)∣∣ H+(aq,pHC)∣ H2(g,p2)∣ Pt(s)
Where pHA is the pH of the aqueous solution in the anode half-cell and pHC 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

Accepted Answer

A) 0)0296 V log (pHA/pH
C) . 
B) 0)0296 V log (pHC/pH
A) . 
C) 0)0592 V (pHA - pH
C) . 
D) 0)0592 V (pHC - pH
A) . 
A) 0)0296 V log (pHA/pH
C) . 
B) 0)0296 V log (pHC/pH
A) . 
C) 0)0592 V (pHA - pH
C) . 
D) 0)0592 V (pHC - pH
A) .

Question 16

The cell reaction for a lead storage battery is:
Pb(s)+ PbO2(s)+ 2 H+(aq)+ 2 HSO4-(aq)→ 2 PbSO4(s)+ 2 H2O(l)
E° = +1.92 V
To provide a potential of about 12 V,one could

Accepted Answer

A) adjust the pH to 12. 
B) adjust the pH to 1. 
C) connect six cells in series. 
D) greatly increase the surface area of the Pb(s)and PbO2(s). 
A) adjust the pH to 12. 
B) adjust the pH to 1. 
C) connect six cells in series. 
D) greatly increase the surface area of the Pb(s)and PbO2(s).

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 40.0 minutes?

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

Consider the following standard reduction potentials, Ni²⁺(aq)+ 2 e^- → Ni(s)E° = - 0.26 V I₂(s)+ 2 e^- → 2 I^-(aq)E° = +0.54 V Under standard conditions,

-Is the cell shown above a galvanic or an electrolytic cell? Which is the anode and which is the cathode?

-According to Table 17.1,which aqueous metal ion will reduce Ag⁺,but not Cu²⁺?

In the galvanic cell represented by the shorthand notation below,electrons are lost by and gained by . Pt(s)| Sn²⁺(aq)| Sn⁴⁺(aq)|| Br₂(l)|Br^-(aq)| Pt(s)

Which is not true for standard electrode potentials?

Based on the half-reactions and their respective standard reduction potentials below,the standard cell potential for the reaction that is expected to occur is ________ V. Ag⁺(aq)+ e^- → Ag(s)0.80 V 2 H⁺(aq)+ 2 e^- → H₂(g)0.00 V Cd²⁺(aq)+ 2 e^- → Cd(s)-0.40 V

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Fe²⁺(aq)∣ Fe(s)

Write the overall cell reaction for the galvanic cell given below. Pt(s)∣ H₂(g)∣ H⁺(aq)∣∣ Cl₂(g)∣ Cl^-(aq)∣ Pt(s)

For the galvanic cell that uses the reaction 2 Al(s)+ 3 Zn²⁺(aq)→ 2 Al³⁺(aq)+ 3 Zn(s) the value of n in the relationship ΔG° = -nFE° is ________.

What is the Al³⁺:Ag⁺concentration ratio in the cell Al(s)| Al³⁺(aq)∣∣ Ag⁺(aq)| Ag(s)if the measured cell potential is 2.34 V?

A cell based on the reaction below has a standard potential of +0.42 V at 25°C.If all of the species are at standard conditions except [H⁺],at what pH will the cell have a potential of zero? H₂O₂(aq)+ 2 H⁺(aq)+ 2 Cl^-(aq)→ Cl₂(aq)+ 2 H₂O(l)

The cell reaction for a lead storage battery is: Pb(s)+ PbO₂(s)+ 2 H⁺(aq)+ 2 HSO₄^-(aq)→ 2 PbSO₄(s)+ 2 H₂O(l) E° = +1.92 V To provide a potential of about 12 V,one could

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Exam 17: Electrochemistry

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 40.0 minutes?

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

Consider the following standard reduction potentials, Ni2+(aq)+ 2 e- → Ni(s)E° = - 0.26 V I2(s)+ 2 e- → 2 I-(aq)E° = +0.54 V Under standard conditions,

-Is the cell shown above a galvanic or an electrolytic cell? Which is the anode and which is the cathode?

-According to Table 17.1,which aqueous metal ion will reduce Ag+,but not Cu2+?

In the galvanic cell represented by the shorthand notation below,electrons are lost by ________ and gained by ________. Pt(s)| Sn2+(aq)| Sn4+(aq)|| Br2(l)|Br-(aq)| Pt(s)

Which is not true for standard electrode potentials?

Based on the half-reactions and their respective standard reduction potentials below,the standard cell potential for the reaction that is expected to occur is ________ V. Ag+(aq)+ e- → Ag(s)0.80 V 2 H+(aq)+ 2 e- → H2(g)0.00 V Cd2+(aq)+ 2 e- → Cd(s)-0.40 V

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al3+(aq)∣∣ Fe2+(aq)∣ Fe(s)

Write the overall cell reaction for the galvanic cell given below. Pt(s)∣ H2(g)∣ H+(aq)∣∣ Cl2(g)∣ Cl-(aq)∣ Pt(s)

For the galvanic cell that uses the reaction 2 Al(s)+ 3 Zn2+(aq)→ 2 Al3+(aq)+ 3 Zn(s) the value of n in the relationship ΔG° = -nFE° is ________.

What is the Al3+:Ag+concentration ratio in the cell Al(s)| Al3+(aq)∣∣ Ag+(aq)| Ag(s)if the measured cell potential is 2.34 V?

A cell based on the reaction below has a standard potential of +0.42 V at 25°C.If all of the species are at standard conditions except [H+],at what pH will the cell have a potential of zero? H2O2(aq)+ 2 H+(aq)+ 2 Cl-(aq)→ Cl2(aq)+ 2 H2O(l)

The cell reaction for a lead storage battery is: Pb(s)+ PbO2(s)+ 2 H+(aq)+ 2 HSO4-(aq)→ 2 PbSO4(s)+ 2 H2O(l) E° = +1.92 V To provide a potential of about 12 V,one could

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 40.0 minutes?

Consider the following standard reduction potentials, Ni²⁺(aq)+ 2 e^- → Ni(s)E° = - 0.26 V I₂(s)+ 2 e^- → 2 I^-(aq)E° = +0.54 V Under standard conditions,

-According to Table 17.1,which aqueous metal ion will reduce Ag⁺,but not Cu²⁺?

In the galvanic cell represented by the shorthand notation below,electrons are lost by and gained by . Pt(s)| Sn²⁺(aq)| Sn⁴⁺(aq)|| Br₂(l)|Br^-(aq)| Pt(s)

Based on the half-reactions and their respective standard reduction potentials below,the standard cell potential for the reaction that is expected to occur is ________ V. Ag⁺(aq)+ e^- → Ag(s)0.80 V 2 H⁺(aq)+ 2 e^- → H₂(g)0.00 V Cd²⁺(aq)+ 2 e^- → Cd(s)-0.40 V

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Fe²⁺(aq)∣ Fe(s)

Write the overall cell reaction for the galvanic cell given below. Pt(s)∣ H₂(g)∣ H⁺(aq)∣∣ Cl₂(g)∣ Cl^-(aq)∣ Pt(s)

For the galvanic cell that uses the reaction 2 Al(s)+ 3 Zn²⁺(aq)→ 2 Al³⁺(aq)+ 3 Zn(s) the value of n in the relationship ΔG° = -nFE° is ________.

What is the Al³⁺:Ag⁺concentration ratio in the cell Al(s)| Al³⁺(aq)∣∣ Ag⁺(aq)| Ag(s)if the measured cell potential is 2.34 V?

A cell based on the reaction below has a standard potential of +0.42 V at 25°C.If all of the species are at standard conditions except [H⁺],at what pH will the cell have a potential of zero? H₂O₂(aq)+ 2 H⁺(aq)+ 2 Cl^-(aq)→ Cl₂(aq)+ 2 H₂O(l)

The cell reaction for a lead storage battery is: Pb(s)+ PbO₂(s)+ 2 H⁺(aq)+ 2 HSO₄^-(aq)→ 2 PbSO₄(s)+ 2 H₂O(l) E° = +1.92 V To provide a potential of about 12 V,one could