Question 1

The standard potential of the Cu2+/Cu electrode is +0.34 V and the standard potential of the cell Ag(s) |AgCl(s) |Cl-(aq) m Cu2+(aq) |Cu(s) 
Is +0.12 V.What is the standard potential of the AgCl/Ag,Cl- electrode?

Accepted Answer

A)  -0.46 V
B)  -0.22 V
C)  +0.24 V
D)  +0.46 V
E)  +0.22 VF) B) and C)
G) All of the above

Question 2

In the determination of iron in vitamins,Fe2+ is titrated with permanganate,MnO4-,in acidic solution.The products of the reaction are Fe3+ and Mn2+.In the balanced equation,the number of electrons transferred is

Accepted Answer

A)  5
B)  1
C)  10
D)  7E) All of the above
F) A) and B)

Question 3

Use the following diagram of a cell to answer questions  
-In the cell shown above,A is a standard Ag+/Ag electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is +0.80 V,which electrode is negative?

Accepted Answer

Question 4

The half-reaction that occurs at cathode when 1 M AgNO3(aq)is electrolyzed is __________________.

Accepted Answer

Question 5

When KI(aq)is electrolyzed at a concentration of 1 M,the product at the anode is I2.

Accepted Answer

A) True 
 B)False

Question 6

For the cell diagram Pt|H2(g) ,H+(aq) m Cu2+(aq) |Cu(s) 
Which reaction occurs at the anode?

Accepted Answer

A)  Cu(s)  →\rightarrow→   Cu2+(aq) + 2e- 
B)  2H+(aq) + 2e- →\rightarrow→   H2(g) 
C)  2H+(aq) + Cu(s)  →\rightarrow→   H2(g) + Cu2+(aq) 
D)  Cu2+(aq) + 2e- →\rightarrow→   Cu(s) 
E)  H2(g)  →\rightarrow→   2H+(aq) + 2e-  F) B) and E)
G) B) and C)

Question 7

In a working electrochemical cell (+ cell voltage),the electrons flow from the anode through the external circuit to the cathode.

Accepted Answer

A) True 
 B)False

Question 8

The standard potential of the Cu2+/Cu electrode is +0.34 V and the standard potential of the cell Pb(s) |Pb2+(aq) m Cu2+(aq) |Cu(s) 
Is +0.47 V.What is the standard potential of the Pb2+/Pb electrode?

Accepted Answer

A)  -0.26 V
B)  +0.81 V
C)  -0.81V
D)  -0.13 V
E)  +0.13 VF) A) and E)
G) A) and D)

Question 9

Given: S2O42-(aq)  →\rightarrow→  SO32-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Accepted Answer

A)  3
B)  6
C)  1
D)  4
E)  2 F) B) and C)
G) A) and E)

Question 10

Which of the following metals would be suitable to provide cathodic protection from corrosion for an iron bridge?

Accepted Answer

A)  Cu
B)  Ni
C)  Zn
D)  Sn
E)  PbF) C) and D)
G) A) and D)

Question 11

For the reduction of Cu2+ by Zn,S1U1P1$\circ$S1S1P0Go = -212 kJ/mol and Eo = +1.10 V.If the coefficients in the chemical equation for this reaction are multiplied by 2,S1U1P1$\circ$S1S1P0Go = -424 kJ/mol.This means Eo = +2.20 V.

Accepted Answer

A) True 
 B)False

Question 12

Consider the following cell:
Zn(s)|Zn2+(aq,0.10 M)m|Cu2+(aq,0.10 M)|Cu(s)
At equilibrium,what is the concentration of Zn2+(aq)?

Accepted Answer

The answer of Consider the following cell:
Zn(s)|Zn2+(aq,0.10 M)m|Cu2+(aq,0.10 M)|Cu(s)
At equilibrium,what...

Question 13

How many seconds are required to produce 4.99 mg of chromium metal from an acidic solution of potassium dichromate,using a current of 0.234 A?

Accepted Answer

The answer of How many seconds are required to produce...

Question 14

Use the following diagram of a cell to answer questions +/Ag electrode connected to a standard hydrogen electrode (SHE) .When the voltmeter reading is -0.80 V,which half-reaction occurs in the left-hand cell compartment? A) Ag(s)  \rightarrow  Ag+(aq) + e-  B) Ag+(aq) + e-  \rightarrow   Ag(s)  " class="answers-bank-image d-inline" rel="preload" >
-Using the cell shown above,A is a standard Ag+/Ag electrode connected to a standard hydrogen electrode (SHE) .When the voltmeter reading is -0.80 V,which half-reaction occurs in the left-hand cell compartment?

Accepted Answer

A)  Ag(s)  →\rightarrow→  Ag+(aq) + e- 
B)  Ag+(aq) + e-  →\rightarrow→   Ag(s)  C) A) and B)
D) undefined

Question 15

Which species will oxidize Cr2+ but not Mn2+?

Accepted Answer

A)  Pb4+ 
B)  O3 in acidic medium
C)  Zn2+ 
D)  Fe2+ 
E)  V3+ F) None of the above
G) All of the above

Question 16

Given: Cr(OH) 3(s)  →\rightarrow→  CrO42-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Accepted Answer

A)  3
B)  6
C)  5
D)  7
E)  4 F) All of the above
G) A) and C)

Question 17

Of the following metals,which metal would be suitable to provide an iron bridge with cathodic protection from corrosion?

Accepted Answer

A)  Ni
B)  Cu
C)  Pb
D)  Sn
E)  None of the metals listed is suitable.F) A) and E)
G) All of the above

Question 18

Use the following diagram of a cell to answer questions 
-In the cell shown above,A is a standard Zn2+/Zn electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is -0.76 V,which electrode is negative?

Accepted Answer

The answer of Use the following diagram of a cell...

Question 19

What is the value of E for the following reaction?
2H+(aq,1.00 M)+ 2e-F$\rightarrow$ H2(g,1.00 atm)

Accepted Answer

The answer of What is the value of E for...

Question 20

Consider the following reaction: 2Cu+(aq)  →\rightarrow→  Cu(s) + Cu2+(aq) 
If the standard potentials of Cu2+ and Cu+ are +0.34 and +0.52 V,respectively,calculate the value of E ∘\circ∘  for the given reaction.

Accepted Answer

A)  +0.86 V
B)  +0.70 V
C)  +0.18 V
D)  -0.18 V
E)  -0.70 V F) All of the above
G) C) and D)

Exam 14: Electrochemistry

How many seconds are required to produce 4.99 mg of chromium metal from an acidic solution of potassium dichromate,using a current of 0.234 A?

Correct Answer
verified

Consider the following reaction: 2Cu⁺(aq) $\rightarrow$ Cu(s) + Cu²⁺(aq) If the standard potentials of Cu²⁺ and Cu⁺ are +0.34 and +0.52 V,respectively,calculate the value of E^$\circ$ for the given reaction.

Correct Answer
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Consider the following cell: Zn(s)|Zn²⁺(aq,0.10 M)m|Cu²⁺(aq,0.10 M)|Cu(s) At equilibrium,what is the concentration of Zn²⁺(aq)?

Correct Answer
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Given: Cr(OH) ₃(s) $\rightarrow$ CrO₄²^-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct Answer
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The standard potential of the Cu²⁺/Cu electrode is +0.34 V and the standard potential of the cell Pb(s) |Pb²⁺(aq) m Cu²⁺(aq) |Cu(s) Is +0.47 V.What is the standard potential of the Pb²⁺/Pb electrode?

Correct Answer
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Of the following metals,which metal would be suitable to provide an iron bridge with cathodic protection from corrosion?

Correct Answer
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For the reduction of Cu²⁺ by Zn,^$\circ$G^o = -212 kJ/mol and E^o = +1.10 V.If the coefficients in the chemical equation for this reaction are multiplied by 2,^$\circ$G^o = -424 kJ/mol.This means E^o = +2.20 V.

Correct Answer
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Given: S₂O₄²^-(aq) $\rightarrow$ SO₃²^-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct Answer
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In a working electrochemical cell (+ cell voltage),the electrons flow from the anode through the external circuit to the cathode.

Correct Answer
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What is the value of E for the following reaction? 2H⁺(aq,1.00 M)+ 2e^-F $\rightarrow$ H₂(g,1.00 atm)

Correct Answer
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Which of the following metals would be suitable to provide cathodic protection from corrosion for an iron bridge?

Correct Answer
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Correct Answer
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The standard potential of the Cu²⁺/Cu electrode is +0.34 V and the standard potential of the cell Ag(s) |AgCl(s) |Cl^-(aq) m Cu²⁺(aq) |Cu(s) Is +0.12 V.What is the standard potential of the AgCl/Ag,Cl^- electrode?

Correct Answer
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Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Ag⁺/Ag electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is +0.80 V,which electrode is negative?

Correct Answer
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Which species will oxidize Cr²⁺ but not Mn²⁺?

Correct Answer
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In the determination of iron in vitamins,Fe²⁺ is titrated with permanganate,MnO₄^-,in acidic solution.The products of the reaction are Fe³⁺ and Mn²⁺.In the balanced equation,the number of electrons transferred is

Correct Answer
verified

Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Zn²⁺/Zn electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is -0.76 V,which electrode is negative?

Correct Answer
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When KI(aq)is electrolyzed at a concentration of 1 M,the product at the anode is I₂.

Correct Answer
verified

The half-reaction that occurs at cathode when 1 M AgNO₃(aq)is electrolyzed is __________________.

Correct Answer
verified

For the cell diagram Pt|H₂(g) ,H⁺(aq) m Cu²⁺(aq) |Cu(s) Which reaction occurs at the anode?

Correct Answer
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Exam 14: Electrochemistry

How many seconds are required to produce 4.99 mg of chromium metal from an acidic solution of potassium dichromate,using a current of 0.234 A?

Correct AnswerverifiedShow Answer

Consider the following reaction: 2Cu+(aq) →\rightarrow→ Cu(s) + Cu2+(aq) If the standard potentials of Cu2+ and Cu+ are +0.34 and +0.52 V,respectively,calculate the value of E ∘\circ∘ for the given reaction.

Correct AnswerverifiedShow Answer

Consider the following cell: Zn(s)|Zn2+(aq,0.10 M)m|Cu2+(aq,0.10 M)|Cu(s) At equilibrium,what is the concentration of Zn2+(aq)?

Correct AnswerverifiedShow Answer

Given: Cr(OH) 3(s) →\rightarrow→ CrO42-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct AnswerverifiedShow Answer

The standard potential of the Cu2+/Cu electrode is +0.34 V and the standard potential of the cell Pb(s) |Pb2+(aq) m Cu2+(aq) |Cu(s) Is +0.47 V.What is the standard potential of the Pb2+/Pb electrode?

Correct AnswerverifiedShow Answer

Of the following metals,which metal would be suitable to provide an iron bridge with cathodic protection from corrosion?

Correct AnswerverifiedShow Answer

For the reduction of Cu2+ by Zn, ∘\circ∘ Go = -212 kJ/mol and Eo = +1.10 V.If the coefficients in the chemical equation for this reaction are multiplied by 2, ∘\circ∘ Go = -424 kJ/mol.This means Eo = +2.20 V.

Correct AnswerverifiedShow Answer

Given: S2O42-(aq) →\rightarrow→ SO32-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct AnswerverifiedShow Answer

In a working electrochemical cell (+ cell voltage),the electrons flow from the anode through the external circuit to the cathode.

Correct AnswerverifiedShow Answer

What is the value of E for the following reaction? 2H+(aq,1.00 M)+ 2e-F →\rightarrow→ H2(g,1.00 atm)

Correct AnswerverifiedShow Answer

Which of the following metals would be suitable to provide cathodic protection from corrosion for an iron bridge?

Correct AnswerverifiedShow Answer

Use the following diagram of a cell to answer questions -Using the cell shown above,A is a standard Ag+/Ag electrode connected to a standard hydrogen electrode (SHE) .When the voltmeter reading is -0.80 V,which half-reaction occurs in the left-hand cell compartment?

Correct AnswerverifiedShow Answer

The standard potential of the Cu2+/Cu electrode is +0.34 V and the standard potential of the cell Ag(s) |AgCl(s) |Cl-(aq) m Cu2+(aq) |Cu(s) Is +0.12 V.What is the standard potential of the AgCl/Ag,Cl- electrode?

Correct AnswerverifiedShow Answer

Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Ag+/Ag electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is +0.80 V,which electrode is negative?

Correct AnswerverifiedShow Answer

Which species will oxidize Cr2+ but not Mn2+?

Correct AnswerverifiedShow Answer

In the determination of iron in vitamins,Fe2+ is titrated with permanganate,MnO4-,in acidic solution.The products of the reaction are Fe3+ and Mn2+.In the balanced equation,the number of electrons transferred is

Correct AnswerverifiedShow Answer

Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Zn2+/Zn electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is -0.76 V,which electrode is negative?

Correct AnswerverifiedShow Answer

When KI(aq)is electrolyzed at a concentration of 1 M,the product at the anode is I2.

Correct AnswerverifiedShow Answer

The half-reaction that occurs at cathode when 1 M AgNO3(aq)is electrolyzed is __________________.

Correct AnswerverifiedShow Answer

For the cell diagram Pt|H2(g) ,H+(aq) m Cu2+(aq) |Cu(s) Which reaction occurs at the anode?

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Correct Answer
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Consider the following reaction: 2Cu⁺(aq) $\rightarrow$ Cu(s) + Cu²⁺(aq) If the standard potentials of Cu²⁺ and Cu⁺ are +0.34 and +0.52 V,respectively,calculate the value of E^$\circ$ for the given reaction.

Correct Answer
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Consider the following cell: Zn(s)|Zn²⁺(aq,0.10 M)m|Cu²⁺(aq,0.10 M)|Cu(s) At equilibrium,what is the concentration of Zn²⁺(aq)?

Correct Answer
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Given: Cr(OH) ₃(s) $\rightarrow$ CrO₄²^-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct Answer
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The standard potential of the Cu²⁺/Cu electrode is +0.34 V and the standard potential of the cell Pb(s) |Pb²⁺(aq) m Cu²⁺(aq) |Cu(s) Is +0.47 V.What is the standard potential of the Pb²⁺/Pb electrode?

Correct Answer
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Correct Answer
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For the reduction of Cu²⁺ by Zn,^$\circ$G^o = -212 kJ/mol and E^o = +1.10 V.If the coefficients in the chemical equation for this reaction are multiplied by 2,^$\circ$G^o = -424 kJ/mol.This means E^o = +2.20 V.

Correct Answer
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Given: S₂O₄²^-(aq) $\rightarrow$ SO₃²^-(aq) ,basic solution. How many electrons appear in the balanced half-reaction?

Correct Answer
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Correct Answer
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What is the value of E for the following reaction? 2H⁺(aq,1.00 M)+ 2e^-F $\rightarrow$ H₂(g,1.00 atm)

Correct Answer
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Correct Answer
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Correct Answer
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The standard potential of the Cu²⁺/Cu electrode is +0.34 V and the standard potential of the cell Ag(s) |AgCl(s) |Cl^-(aq) m Cu²⁺(aq) |Cu(s) Is +0.12 V.What is the standard potential of the AgCl/Ag,Cl^- electrode?

Correct Answer
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Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Ag⁺/Ag electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is +0.80 V,which electrode is negative?

Correct Answer
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Which species will oxidize Cr²⁺ but not Mn²⁺?

Correct Answer
verified

In the determination of iron in vitamins,Fe²⁺ is titrated with permanganate,MnO₄^-,in acidic solution.The products of the reaction are Fe³⁺ and Mn²⁺.In the balanced equation,the number of electrons transferred is

Correct Answer
verified

Use the following diagram of a cell to answer questions -In the cell shown above,A is a standard Zn²⁺/Zn electrode connected to a standard hydrogen electrode (SHE).If the voltmeter reading is -0.76 V,which electrode is negative?

Correct Answer
verified

When KI(aq)is electrolyzed at a concentration of 1 M,the product at the anode is I₂.

Correct Answer
verified

The half-reaction that occurs at cathode when 1 M AgNO₃(aq)is electrolyzed is __________________.

Correct Answer
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For the cell diagram Pt|H₂(g) ,H⁺(aq) m Cu²⁺(aq) |Cu(s) Which reaction occurs at the anode?

Correct Answer
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