Identify each half-reaction below as either oxidation or reduction.
(a)
Interpretation:
The following half-reaction should be identified as either oxidation or reduction.
Concept Introduction:
The chemical reaction in which a substance loses an electron is known as oxidation reaction. The chemical reaction in which a substance gains an electron is known as reduction reaction.
Answer to Problem 1E
The given half-reaction is a reduction reaction.
Explanation of Solution
The oxidation state of a substance increases in oxidation reaction while the oxidation state decreases in reduction reaction.
In the given half-reaction, the oxidation state of Fe decreases due to addition of electron. Therefore, the reduction of Fe takes place in the given reaction.
Thus, the given half-reaction is a reduction reaction.
(b)
Interpretation:
The following half-reaction should be identified as either oxidation or reduction.
Concept Introduction:
The chemical reaction in which a substance loses an electron is known as oxidation reaction. The chemical reaction in which a substance gains an electron is known as reduction reaction.
Answer to Problem 1E
The given half-reaction is an oxidation reaction.
Explanation of Solution
The oxidation state of a substance increases in oxidation reaction while the oxidation state decreases in reduction reaction.
In the given half-reaction, the oxidation state of Cr increases due to loss of electron. Therefore, the oxidation of Cr takes place in the given reaction.
Thus, the given half-reaction is an oxidation reaction.
(c)
Interpretation:
The following half-reaction should be identified as either oxidation or reduction.
Concept Introduction:
The chemical reaction in which a substance loses an electron is known as oxidation reaction. The chemical reaction in which a substance gains an electron is known as reduction reaction.
Answer to Problem 1E
The given half-reaction is an oxidation reaction.
Explanation of Solution
The oxidation state of a substance increases in oxidation reaction while the oxidation state decreases in reduction reaction.
In the given half-reaction, the oxidation state of Mn in
Thus, the given half-reaction is an oxidation reaction.
(d)
Interpretation:
The following half-reaction should be identified as either oxidation or reduction.
Concept Introduction:
The chemical reaction in which a substance loses an electron is known as oxidation reaction. The chemical reaction in which a substance gains an electron is known as reduction reaction.
Answer to Problem 1E
The given half-reaction is a reduction reaction.
Explanation of Solution
The oxidation state of a substance increases in oxidation reaction while the oxidation state decreases in reduction reaction.
In the given half-reaction, the oxidation state of Li decreases due to addition of electron. Therefore, the reduction of Li takes place in the given reaction.
Thus, the given half-reaction is a reduction reaction.
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Chapter 16 Solutions
Chemistry Atoms First2e
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