Redox Reaction Stoichiometry Error
A student combines aqueous solutions of iron(II) sulfate (FeSO₄) and potassium permanganate (KMnO₄) in an acidic medium using sulfuric acid (H₂SO₄). The expected products of the redox reaction are iron(III) sulfate (Fe₂(SO₄)₃) and manganese(II) sulfate (MnSO₄). The student observes that the deep purple color of the permanganate solution persists with minimal change. Which of the following conceptual errors most likely accounts for this observation?
A
Did not stir the reaction mixture adequately
B
Incorrectly identified the oxidation states of reactants
C
Failed to provide sufficient heat to initiate the reaction
D
Used an excess of sulfuric acid, affecting the reaction
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