(a)
Interpretation:
The following skeletal equation has to be balanced using
Concept Introduction:
Net ionic equation:
Net ionic equation is defined as the specific species that only involves to a particular reaction. This type of equations is generally used in acid-base neutralization reactions and redox reactions.
Oxidizing agent:
The material which gains electron in a
Reducing agent:
The material, which loses electrons in a chemical reaction, is called reducing agent. In this reaction, the oxidation number will be increased.
(a)
Answer to Problem 6K.5E
The balanced reaction of ozone with bromide ions is given below,
Here, the oxidizing agent is
Explanation of Solution
The unbalanced skeletal equation for the reaction is
Oxidation half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Therefore, the balanced oxidation half-reaction is
Here,
Reduction half-reaction:
The oxidation number of
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Therefore, the balanced reduction half-reaction is
Here, the
Now add the two half reactions together. Match the number of electrons in each side. Because in oxidation half reaction 6 electrons are lost and in reduction half reaction
Add the equation and cancel the common ions, electrons and water molecules in each side of the arrow.
Divide by 2 each side of the arrow.
Therefore, the balanced net ionic equation the above reaction is
(b)
Interpretation:
The following skeletal equation has to be balanced using oxidation and reduction half reactions and also the oxidizing agent, reducing agent has to be identified.
Concept introduction:
Refer to part (a).
(b)
Answer to Problem 6K.5E
The balanced reaction of bromine with itself in aqueous solution is given below,
Here, the oxidizing agent and reducing agent is
Explanation of Solution
The unbalanced skeletal equation for the reaction is
Oxidation half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Therefore, the balanced oxidation half-reaction is
Here,
Reduction half-reaction:
The oxidation number of
Balance the equation except
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Here, the
Now add the two half reactions together. Match the number of electrons in each side. Because in oxidation half reaction
Add the equation and cancel the common ions, electrons and water molecules in each side of the arrow.
Divide by
Therefore, the balanced net ionic equation the above reaction is
(c)
Interpretation:
The following skeletal equation has to be balanced using oxidation and reduction half reactions and also the oxidizing agent, reducing agent has to be identified.
Concept introduction:
Refer to part (a).
(c)
Answer to Problem 6K.5E
The balanced reaction for the formation of chromate ions from chromium (III) ions is given below,
Here, the oxidizing agent is
Explanation of Solution
The unbalanced skeletal equation for the reaction is
Oxidation half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Therefore, the balanced oxidation half-reaction is
Here,
Reduction half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Here, the
Now add the two half reactions together. Match the number of electrons in each side. Because in oxidation half reaction
Add the equation and cancel the common ions, electrons and water molecules in each side of the arrow.
Therefore, the balanced net ionic equation the above reaction is
(d)
Interpretation:
The following skeletal equation has to be balanced using oxidation and reduction half reactions and also the oxidizing agent, reducing agent has to be identified.
Concept introduction:
Refer to part (a).
(d)
Answer to Problem 6K.5E
The balanced reaction for the formation of phosphine, a poisonous gas with odor of decaying fish is given below,
Here, the oxidizing agent and reducing agent is
Explanation of Solution
The unbalanced skeletal equation for the reaction is
Oxidation half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Therefore, the balanced oxidation half-reaction is
Here,
Reduction half-reaction:
The oxidation number of
Balance the equation except
Balance the
Balance the net charges by adding the electrons.
Here, in left side, the net charge is
Here, the
Now add the two half reactions together. Match the number of electrons in each side. Because in oxidation half reaction
Add the equation and cancel the common ions, electrons and water molecules in each side of the arrow.
Divide by
Therefore, the balanced net ionic equation the above reaction is
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Chapter 6 Solutions
Chemical Principles: The Quest for Insight
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