Question: In the reaction 2Fe²⁺ + 2MnO4⁻ → 2Fe³⁺ + 2Mn²⁺, what is the oxidation state change for iron? (2021)
Options:
+2 to +3
+3 to +2
0 to +2
−2 to 0
Correct Answer: +2 to +3
Exam Year: 2021
Solution:
Iron changes its oxidation state from +2 to +3, indicating that it is oxidized.
In the reaction 2Fe²⁺ + 2MnO4⁻ → 2Fe³⁺ + 2Mn²⁺, what is the oxidation state chan
Practice Questions
Q1
In the reaction 2Fe²⁺ + 2MnO4⁻ → 2Fe³⁺ + 2Mn²⁺, what is the oxidation state change for iron? (2021)
+2 to +3
+3 to +2
0 to +2
−2 to 0
Questions & Step-by-Step Solutions
In the reaction 2Fe²⁺ + 2MnO4⁻ → 2Fe³⁺ + 2Mn²⁺, what is the oxidation state change for iron? (2021)
Step 1: Identify the oxidation states of iron (Fe) in the reaction.
Step 2: Look at the reactants: 2Fe²⁺ means iron has an oxidation state of +2.
Step 3: Look at the products: 2Fe³⁺ means iron has an oxidation state of +3.
Step 4: Determine the change in oxidation state: +2 to +3 is an increase.
Step 5: Conclude that since the oxidation state increased, iron is oxidized.
Oxidation and Reduction – Understanding how oxidation states change during chemical reactions, specifically identifying which species are oxidized and which are reduced.
Balancing Redox Reactions – Recognizing the need to balance the number of electrons lost and gained in redox reactions.
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