
(a)
Interpretation:
Three
Concept introduction:
The reaction in which both oxidation and reduction reaction occur simultaneously is called a redox reaction. According to the law of conservation of mass, the mass of all the species in a reaction must be balanced. Therefore balancing is necessary to conserve the mass and even the charge must be balanced to maintain the overall charge of the reaction.
(a)

Answer to Problem 32E
The balanced equations are as follows,
Explanation of Solution
The balanced equation is defined as follows,
The reduction half cell reaction is,
The change in the oxidation number of chromium is from
The oxidation half reaction is,
The change in oxidation number of chromium is from zero to
As the atoms other than hydrogen and oxygen are already balanced, so directly balance the oxygen atom in the reduction half reaction by adding water to right hand side,
Balance the hydrogen atoms in the reduction half reaction by adding
Balance the charge by adding appropriate number of electrons to the left hand side,
As the atoms other than hydrogen and oxygen are already balanced in the oxidation half reaction. Therefore directly balance the oxygen by adding water molecule to the left hand side.
Balance the hydrogen atoms by adding
Balance the charge by adding electrons to the right hand side,
Add the oxidation and reduction half reaction,
Cancel similar terms on both the sides,
To balance the reaction in basic medium,
The final equation is,
(b)
Interpretation:
Three oxidation-reduction reactions are given. The balancing of all the reactions in basic media using half-reaction method is to be done.
Concept introduction:
The reaction in which both oxidation and reduction reaction occur simultaneously is called a redox reaction. According to the law of conservation of mass, the mass of all the species in a reaction must be balanced. Therefore balancing is necessary to conserve the mass and even the charge must be balanced to maintain the overall charge of the reaction.
(b)

Answer to Problem 32E
The balanced equations are as follows,
Explanation of Solution
The balanced equation is defined as follows,
The reduction half cell reaction is,
The change in the oxidation number of manganese is from
The oxidation half reaction is,
The change in oxidation number of sulphur is from
Balance all the atoms except hydrogen and oxygen in the reduction half reaction,
Balance the oxygen atoms by adding water molecules to the right hand side,
Balance the hydrogen atoms by adding
Balance the charge by adding appropriate number of electrons to the left hand side,
All the atoms except hydrogen and oxygen are already balanced and there is no hydrogen or oxygen atom in the reaction. So, directly balance the charge by adding appropriate number of electrons.,
Multiply equation (3) by
Cancel similar terms on both the sides,
In basic medium,
Simplify the equation,
(c)
Interpretation:
Three oxidation-reduction reactions are given. The balancing of all the reactions in basic media using half-reaction method is to be done.
Concept introduction:
The reaction in which both oxidation and reduction reaction occur simultaneously is called a redox reaction. According to the law of conservation of mass, the mass of all the species in a reaction must be balanced. Therefore balancing is necessary to conserve the mass and even the charge must be balanced to maintain the overall charge of the reaction.
(c)

Answer to Problem 32E
The balanced equations are as follows,
Explanation of Solution
The balanced equation is defined as follows,
The reduction half cell reaction is,
The change in the oxidation number of manganese is from
The oxidation half reaction is,
The change in the oxidation number of carbon is from
All the elements except hydrogen and oxygen are already balanced so directly balance the oxygen in the reduction half reaction by adding water to right hand side,
Balance the hydrogen atoms in the reduction half reaction by adding
Balance the charge by adding appropriate number of electrons to the left hand side,
All the atoms except hydrogen and oxygen in oxidation half reaction are already balanced. So, directly balance oxygen atom by adding water molecule to the left hand side,
Balance the hydrogen atom by adding
Balance the charge by adding electrons to the right hand side,
Multiply equation (6) by
Cancel similar terms on both the sides,
In basic medium,
The final equation is,
Want to see more full solutions like this?
Chapter 17 Solutions
Chemistry: An Atoms First Approach
- Assign all the protonsarrow_forwardAssign all the carbonsarrow_forward9 7 8 C 9 8 200 190 B 5 A -197.72 9 8 7 15 4 3 0: ང་ 200 190 180 147.52 134.98 170 160 150 140 130 120 110 100 90 90 OH 10 4 3 1 2 -143.04 140. 180 170 160 150 140 130 120 110 100 90 CI 3 5 1 2 141.89 140.07 200 190 180 170 160 150 140 130 120 110 100 ៖- 90 129. 126.25 80 70 60 -60 50 40 10 125.19 -129.21 80 70 3.0 20 20 -8 60 50 10 ppm -20 40 128.31 80 80 70 60 50 40 40 -70.27 3.0 20 10 ppm 00˚0-- 77.17 30 20 20 -45.36 10 ppm -0.00 26.48 22.32 ―30.10 ―-0.00arrow_forward
- Assign all the carbonsarrow_forwardC 5 4 3 CI 2 the Righ B A 5 4 3 The Lich. OH 10 4 5 3 1 LOOP- -147.52 T 77.17 -45.36 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ppm B -126.25 77.03 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ppm 200 190 180 170 160 150 140 130 120 110 100 90 80 TO LL <-50.00 70 60 50 40 30 20 10 ppm 45.06 30.18 -26.45 22.36 --0.00 45.07 7.5 1.93 2.05 -30.24 -22.36 C A 7 8 5 ° 4 3 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ppm 9 8 5 4 3 ཡི་ OH 10 2 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 5 4 3 2 that th 7 I 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 115 2.21 4.00 1.0 ppm 6.96 2.76 5.01 1.0 ppm 6.30 1.00arrow_forwardCurved arrows were used to generate the significant resonance structure and labeled the most significant contribute. What are the errors in these resonance mechanisms. Draw out the correct resonance mechanisms with an brief explanation.arrow_forward
- What are the: нсе * Moles of Hice while given: a) 10.0 ml 2.7M ? 6) 10.ome 12M ?arrow_forwardYou are asked to use curved arrows to generate the significant resonance structures for the following series of compounds and to label the most significant contributor. Identify the errors that would occur if you do not expand the Lewis structures or double-check the mechanisms. Also provide the correct answers.arrow_forwardhow to get limiting reactant and % yield based off this data Compound Mass 6) Volume(mL Ben zaphone-5008 ne Acetic Acid 1. Sam L 2-propanot 8.00 Benzopin- a col 030445 Benzopin a Colone 0.06743 Results Compound Melting Point (°c) Benzopin acol 172°c - 175.8 °c Benzoping to lone 1797-180.9arrow_forward
- Assign ALL signals for the proton and carbon NMR spectra on the following pages.arrow_forward7.5 1.93 2.05 C B A 4 3 5 The Joh. 9 7 8 1 2 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ppm 9 7 8 0.86 OH 10 4 3 5 1 2 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ppm 9 7 8 CI 4 3 5 1 2 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 2.21 4.00 1.5 2.00 2.07 1.0 ppm 2.76arrow_forwardAssign the functional group bands on the IR spectra.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning





