Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN: 9780078746376
Author: Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher: Glencoe/McGraw-Hill School Pub Co
Question
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Chapter 20.1, Problem 7PP
Interpretation Introduction

Interpretation:

The half cell reaction of a given balanced overall reaction is to be written and the cell potential is to be determined.

Concept introduction:

The half cell reactions are the reactions which occur at anode and cathode electrode. The difference between the electrode potential of the two electrodes consisting an electrochemical cell is known as cell potential

Expert Solution & Answer
Check Mark

Answer to Problem 7PP

The half cell reaction at anode

2Hg+2(aq)+2e-Hg2+2

The half cell reaction at cathode is

Mn+2(aq)+4H2OMnO4-+8H++5e-

Thebalancedoverallreactionis2Mn+2(aq)+8H2(l)+ 10Hg+2(g)2MnO4-1+16H++ 5Hg2+2(aq)ThecellreprsentationofthisoverallreactionisHg+2|Hg2+2Mn+2|MnO4-The oxidation is occur at Hg electrode or anode and reduction is occurs at Mn electrode or cathode.The cell potental of the reaction is calculated ascell=E°cathode-E°anode=(1.507)-(0.920)= 0.587 VThe cell potential is 0.587 V

Explanation of Solution

Given information:

Thestandardpotential2Hg+2(aq)+2e-Hg2+2=0.920VThe standardpotentialofMn+2(aq)+4H2OMnO4-+8H++5e-=1.507V

The half cell reaction at anode

2Hg+2(aq)+2e-Hg2+2

The half cell reaction at cathode is

Mn+2(aq)+4H2OMnO4-+8H++5e-

Thebalancedoverallreactionis2Mn+2(aq)+8H2(l)+ 10Hg+2(g)2MnO4-1+16H++ 5Hg2+2(aq)ThecellreprsentationofthisoverallreactionisHg+2|Hg2+2Mn+2|MnO4-The oxidation is occur at Hg electrode or anode and reduction is occurs at Mn electrode or cathode.The cell potental of the reaction is calculated ascell=E°cathode-E°anode=(1.507)-(0.920)= 0.587 VThe cell potential is 0.587 V

Conclusion

Thebalancedoverallreactionis2Mn+2(aq)+8H2(l)+ 10Hg+2(g)2MnO4-1+16H++ 5Hg2+2(aq)ThecellreprsentationofthisoverallreactionisHg+2|Hg2+2Mn+2|MnO4-The oxidation is occur at Hg electrode or anode and reduction is occurs at Mn electrode or cathode.The cell potental of the reaction is calculated ascell=E°cathode-E°anode=(1.507)-(0.920)= 0.587 VThe cell potential is 0.587 V

Chapter 20 Solutions

Chemistry: Matter and Change

Ch. 20.1 - Prob. 11SSCCh. 20.1 - Prob. 12SSCCh. 20.1 - Prob. 13SSCCh. 20.1 - Prob. 14SSCCh. 20.2 - Prob. 15SSCCh. 20.2 - Prob. 16SSCCh. 20.2 - Prob. 17SSCCh. 20.2 - Prob. 18SSCCh. 20.2 - Prob. 19SSCCh. 20.2 - Prob. 20SSCCh. 20.2 - Prob. 21SSCCh. 20.3 - Prob. 22SSCCh. 20.3 - Prob. 23SSCCh. 20.3 - Prob. 24SSCCh. 20.3 - Prob. 25SSCCh. 20.3 - Prob. 26SSCCh. 20.3 - Prob. 27SSCCh. 20.3 - Prob. 28SSCCh. 20.3 - Prob. 29SSCCh. 20 - Prob. 30ACh. 20 - Prob. 31ACh. 20 - Prob. 32ACh. 20 - Prob. 33ACh. 20 - Prob. 34ACh. 20 - Prob. 35ACh. 20 - Prob. 36ACh. 20 - Prob. 37ACh. 20 - Prob. 38ACh. 20 - Prob. 39ACh. 20 - Prob. 40ACh. 20 - Prob. 41ACh. 20 - Prob. 42ACh. 20 - Prob. 43ACh. 20 - Prob. 44ACh. 20 - Prob. 45ACh. 20 - Prob. 46ACh. 20 - Prob. 47ACh. 20 - Prob. 48ACh. 20 - Prob. 49ACh. 20 - Prob. 50ACh. 20 - Prob. 51ACh. 20 - Prob. 52ACh. 20 - Prob. 53ACh. 20 - Prob. 54ACh. 20 - Prob. 55ACh. 20 - Prob. 56ACh. 20 - Prob. 57ACh. 20 - Prob. 58ACh. 20 - Prob. 59ACh. 20 - Prob. 60ACh. 20 - Prob. 61ACh. 20 - Prob. 62ACh. 20 - Prob. 63ACh. 20 - Prob. 64ACh. 20 - Prob. 65ACh. 20 - Prob. 66ACh. 20 - Prob. 67ACh. 20 - Prob. 68ACh. 20 - Prob. 69ACh. 20 - Prob. 70ACh. 20 - Prob. 71ACh. 20 - Prob. 72ACh. 20 - Prob. 73ACh. 20 - Prob. 74ACh. 20 - Prob. 75ACh. 20 - Prob. 76ACh. 20 - Prob. 77ACh. 20 - Prob. 78ACh. 20 - Prob. 79ACh. 20 - Prob. 80ACh. 20 - Prob. 81ACh. 20 - Prob. 82ACh. 20 - Prob. 83ACh. 20 - Prob. 84ACh. 20 - Prob. 85ACh. 20 - Prob. 86ACh. 20 - Prob. 87ACh. 20 - Prob. 88ACh. 20 - Prob. 89ACh. 20 - Prob. 90ACh. 20 - Prob. 91ACh. 20 - Prob. 92ACh. 20 - Prob. 93ACh. 20 - Prob. 94ACh. 20 - Prob. 95ACh. 20 - Prob. 96ACh. 20 - Prob. 97ACh. 20 - Prob. 98ACh. 20 - Prob. 1STPCh. 20 - Prob. 2STPCh. 20 - Prob. 3STPCh. 20 - Prob. 4STPCh. 20 - Prob. 5STPCh. 20 - Prob. 6STPCh. 20 - Prob. 7STPCh. 20 - Prob. 8STPCh. 20 - Prob. 9STPCh. 20 - Prob. 10STPCh. 20 - Prob. 11STPCh. 20 - Prob. 12STPCh. 20 - Prob. 13STPCh. 20 - Prob. 14STPCh. 20 - Prob. 15STP
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