Multiple Choice
In the redox reaction Sn²⁺(aq) + 2 Fe³⁺(aq) → Sn⁴⁺(aq) + 2 Fe²⁺(aq), which substance is undergoing oxidation and which is undergoing reduction?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
Multiple Choice
In a redox reaction, which of the following statements correctly identifies the oxidation half-reaction?
A
The half-reaction where the oxidation state of a species decreases.
B
The half-reaction where a species is reduced.
C
The half-reaction where electrons are gained by a species.
D
The half-reaction where electrons are lost by a species.
Verified step by step guidance1
Understand the concept of a redox reaction: A redox reaction involves the transfer of electrons between two species. It consists of two half-reactions: oxidation and reduction.
Define oxidation: Oxidation is the process where a species loses electrons. This results in an increase in the oxidation state of the species.
Identify the oxidation half-reaction: In the oxidation half-reaction, electrons are lost by a species. This is the key characteristic that differentiates it from the reduction half-reaction.
Clarify the reduction half-reaction: In contrast, the reduction half-reaction involves the gain of electrons by a species, leading to a decrease in its oxidation state.
Apply the correct statement: The correct identification of the oxidation half-reaction is the one where electrons are lost by a species, which aligns with the definition of oxidation.
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