
(a)
Interpretation:The reaction
Concept introduction:The
(a)

Answer to Problem 82E
The balanced reaction is
Explanation of Solution
The given chemical equation is shown below.
The reduction half reaction for manganese is shown below.
To balance the oxygen atoms, add
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add
The oxidation half reaction for aluminum is shown below.
To balance the oxygen atoms, add
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add
Add equation (1) and (2) to obtain the final equation.
Thus, the final balanced equation in basic medium becomes,
(b)
Interpretation:The reaction
Concept introduction:The redox reactions are associated with the change in oxidation number of the interacting elements. These reactions are balanced by using half reaction method. The half reaction method is used either in acidic or basic medium. This method works better when the interacting species are present in aqueous medium.
(b)

Answer to Problem 82E
The balanced reaction is
Explanation of Solution
The given chemical equation is shown below.
The reduction half reaction for chlorine is shown below.
To balance the chlorine atoms both the sides add coefficient
To balance the charge, add two electrons on reactant sidethen the equation becomes,
The oxidation half reaction for chlorine is shown below.
To balance the chlorine atoms both the sides add coefficient
To balance the oxygen atoms, add
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add
Add equation (1) and (2) to obtain the final equation.
Therefore, the final balanced equation is
(c)
Interpretation:The reaction
Concept introduction:The redox reactions are associated with the change in oxidation number of the interacting elements. These reactions are balanced by using half reaction method. The half reaction method is used either in acidic or basic medium. This method works better when the interacting species are present in aqueous medium.
(c)

Answer to Problem 82E
The balanced reaction is
Explanation of Solution
The given chemical equation is shown below.
The reduction half reaction for chlorine is shown below.
To balance the oxygen atoms both the sides add two
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add six electrons on reactant sideare added then the equation becomes,
The oxidation half reaction for aluminum is shown below.
To balance the oxygen atoms, add
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add three electrons on product side are addedthen the equation becomes,
To balance the electron transfer in half reactions, multiply equation (2) with
Add equation (1) and (3) to obtain the final equation.
Therefore, the final balanced equation is:
(d)
Interpretation:The reaction
Concept introduction:The redox reactions are associated with the change in oxidation number of the interacting elements. These reactions are balanced by using half reaction method. The half reaction method is used either in acidic or basic medium. This method works better when the interacting species are present in aqueous medium.
(d)

Answer to Problem 82E
The balanced reaction is
Explanation of Solution
The given chemical equation is shown below.
The reduction half reaction for manganese is shown below.
Balancing atoms other than O and H:
To balance the oxygen atoms, add four
To balance the hydrogen atoms, add
For reaction in basic medium,
ion present on both the sides are combined to form water):
To balance the charge, add five electrons on reactant side then the equation becomes,
The oxidation half reaction for sulfur is shown below.
To balance the charge, add two electrons on product side then the equation becomes,
To balance the electron transfer in half reactions, multiply equation (1) with
And multiply equation (2) with five then the equation becomes,
Add equation (3) and (4) to obtain the final equation.
Therefore, the final balanced equation is:
(e)
Interpretation:The reaction
Concept introduction:The redox reactions are associated with the change in oxidation number of the interacting elements. These reactions are balanced by using half reaction method. The half reaction method is used either in acidic or basic medium. This method works better when the interacting species are present in aqueous medium.
(e)

Answer to Problem 82E
The balanced reaction is
Explanation of Solution
The given chemical equation is shown below.
The reduction half reaction for manganese is shown below.
To balance the oxygen atoms, add two
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add three electrons on reactant side then the equation becomes,
The oxidation half reaction for carbon is shown below.
To balance the oxygen atoms, add one
To balance the hydrogen atoms, add
For reaction in basic medium,
To balance the charge, add two electrons on product side then the equation becomes,
To balance the electron transfer in half reactions, multiply equation (1) with
And multiply equation (2) with threethen the equation becomes,
Add equation (3) and (4) to obtain the final equation.
Therefore, the final balanced equation is:
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Chapter 4 Solutions
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