Question detail
In a redox reaction, if the oxidation state of an ion changes from +3 to +1, what type of change has occurred and what does it indicate about electron movement?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Reactivity of metals
Question
In a redox reaction, if the oxidation state of an ion changes from +3 to +1, what type of change has occurred and what does it indicate about electron movement?
Answer
The ion has been reduced, indicating it has gained two electrons.
Explanation
The answer identifies the change as reduction and quantifies the electron gain, showing application of the definition of reduction as gain of electrons. It tests the student’s ability to link oxidation state changes to electron transfer.
Common mistake
Misunderstanding Reduction
Students often confuse reduction with the addition of oxygen instead of the gain of electrons.
Remember that reduction specifically refers to the gain of electrons, while oxidation is the loss of electrons.
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