AP Chemistry
4.9 Oxidation-Reduction (Redox) Reactions
A student standardizes an aqueous solution of potassium permanganate by titrating it against a solution of oxalic acid under acidic conditions. The reaction that occurs during the titration is represented by the following balanced equation: \[ 2\text{MnO}_4^-\text{(aq)} + 5\text{H}_2\text{C}_2\text{O}_4\text{(aq)} + 6\text{H}^+\text{(aq)} \rightarrow 2\text{Mn}^{2+}\text{(aq)} + 10\text{CO}_2\text{(g)} + 8\text{H}_2\text{O}\text{(l)} \] Which species acts as the reducing agent in this reaction, and why?
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