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Magazine Chapter 4: Q.63. (page 128)
Question: Classify each reaction as oxidation, reduction, or neither.
a.
b.
Short Answer
Answer
- The given reaction is an oxidation reaction.
- The reaction is neither reduction nor oxidation.
Step by step solution
Oxidation reactions
Oxidation reactions are characterized by the gain of electrons.
To determine if an oxidation reaction occurs in a given reaction, the bonds attached to the carbon atoms in the reactants and products are compared.
The relative number of bonds that must be compared is C-Z (where Z is an atom that is more electronegative than the carbon atom) and C-H bonds.
Oxidation reactions are identified
- by the gain of C-Z bonds or
- by the loss of C-H bonds.
Reduction reactions
Reduction reactions are characterized by the gain of electrons.
To determine if a reduction reaction is occurring in a given reaction, the relative number of C-Z and C-H bonds attached to the carbon atoms in the reactants and products are compared.
Reduction reactions are identified
- by the gain of C-H bonds or
- by the loss of C-Z bonds.
Determination of oxidation and reduction reactions
- Bromine is a more electronegative element than carbon. Hence, an addition of a bromine atom symbolizes a gain of the C-Z bond. Hence, the given reaction is oxidation.
- In the given reaction, one C-Z and one C-H bond are lost. Hence, the given reaction is neither a reduction nor an oxidation reaction.
Loss of one C-Z and one C-H bond
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