General Chemistry
General Chemistry
4th Edition
ISBN: 9781891389603
Author: Donald A. McQuarrie, Peter A. Rock, Ethan B. Gallogly
Publisher: University Science Books
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Chapter 25, Problem 25.35P

(a)

Interpretation Introduction

Interpretation:

The value of Ecello has to be calculated for the given reaction Cu(s) + [Fe(CN)6]3(aq)  2 Cu+(aq) + [Fe(CN)6]4(aq).

Concept Introduction:

Standard potential (Ecello) can be calculated by the following formula,

  Ecello= Eredo+Eoxo

(a)

Expert Solution
Check Mark

Answer to Problem 25.35P

The value of Ecello is 0.163 V.

Explanation of Solution

The given reaction is shown below,

  Cu(s) + [Fe(CN)6]3(aq)  2 Cu+(aq) + [Fe(CN)6]4(aq)

Reduction half-cell is given below,

  [Fe(CN)6]3(aq) + e(aq) [Fe(CN)6]4(aq) Eredo=0.358 V

Oxidation half-cell is given below,

  Cu(s) Cu+(aq)+ 1e(aq)Eoxo[Cu|Cu+]=Eredo[Cu+|Cu]=0.521 V

Calculate Ecello for the following reaction as follows,

  Ecello= Eredo+Eoxo= (0.358 V)+(0.521 V)=0.163 V

(b)

Interpretation Introduction

Interpretation:

The value of Ecello has to be calculated for the given reaction Fe3+(aq) + Ag(s) Fe2+(aq) + Ag+(aq).

Concept Introduction:

Refer to (a).

(b)

Expert Solution
Check Mark

Answer to Problem 25.35P

The value of Ecello is 0.951 V.

Explanation of Solution

The given reaction is shown below,

  Fe3+(aq) + Ag(s) Fe2+(aq) + Ag+(aq)

Reduction half-cell is given below,

  Fe3+(aq) + e(aq) Fe2+(aq) Eredo=0.771 V

Oxidation half-cell is given below,

  Ag(s)  Ag+(aq)+ e(aq)Eoxo[Ag|Ag+]=Eredo[Ag+|Ag]=0.7996 V

Calculate Ecello for the following reaction as follows,

  Ecello= Eredo+Eoxo= (0.771 V)+(0.7996 V)=0.951 V

(c)

Interpretation Introduction

Interpretation:

The value of Ecello has to be calculated for the given reaction Zn(s) + F2(g)  Zn2+(aq) + 2 F(aq).

Concept Introduction:

Refer to (a).

(c)

Expert Solution
Check Mark

Answer to Problem 25.35P

The value of Ecello is 3.63 V.

Explanation of Solution

The given reaction is shown below,

  Zn(s) + F2(g)  Zn2+(aq) + 2 F(aq)

Reduction half-cell is given below,

  F2(g)+ 2e(aq) 2 F(aq) Eredo=2.866 V

Oxidation half-cell is given below,

  Zn(s)  Zn2+(aq)+ 2e(aq)Eoxo[Zn|Zn2+]=Eredo[Zn2+|Zn] =(0.762 V) = 0.762 V

Calculate Ecello for the following reaction as follows,

  Ecello= Eredo+Eoxo= (2.866 V)+(0.762 V)=3.63 V

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