In the titration of oxalic acid with acidified KMnO₄, the reaction is slow at first but speeds up later. Why?
Correct answer D. Mn²⁺ ions formed act as an autocatalyst
Explanation
Mn²⁺ ions produced in the reaction catalyse further reaction. A product that catalyses its own formation is an autocatalyst, so the rate increases with time.
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