Mechanism of oxidation of ethane by alkaline kMnO4 solution
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Alkenes react with potassium manganate(VII) solution in the cold. The colour change depends on whether the potassium manganate(VII) is used under acidic or alkaline conditions.
If the potassium manganate(VII) solution is acidified with dilute sulphuric acid, the purple solution becomes colourless.
If the potassium manganate(VII) solution is made slightly alkaline (often by adding sodium carbonate solution), the purple solution first becomes dark green and then produces a dark brown precipitate.
If the potassium manganate(VII) solution is acidified with dilute sulphuric acid, the purple solution becomes colourless.
If the potassium manganate(VII) solution is made slightly alkaline (often by adding sodium carbonate solution), the purple solution first becomes dark green and then produces a dark brown precipitate.
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