Multiple Choice
In the disproportionation reaction Cl2(g) → Cl−(aq) + ClO−(aq), which element undergoes both oxidation and reduction?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
Multiple Choice
Classify the transformation of Fe^{3+} to Fe^{2+} as reduction, oxidation, or neither.
A
Reduction
B
Oxidation
C
Neither
Verified step by step guidance1
Identify the oxidation states of iron in both species: Fe^{3+} has an oxidation state of +3, and Fe^{2+} has an oxidation state of +2.
Recall that reduction is the gain of electrons, which corresponds to a decrease in oxidation state, while oxidation is the loss of electrons, corresponding to an increase in oxidation state.
Compare the oxidation states: going from +3 to +2 means the oxidation state decreases by 1, indicating a gain of one electron.
Since the oxidation state decreases, this process is classified as a reduction.
Therefore, the transformation of Fe^{3+} to Fe^{2+} is a reduction reaction.
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