How do we increase the rate of dissolution of potassium permanganate?
Are you asking about the rate of dissolution of potassium permanganate?
To dissolve a solid in a liquid, clearly the rate of dissolution is proportional to the surface area of the solid. Powdered, finely divided substances, therefore, should dissolve more quickly in a medium than should macroscopic crystals. When dissolving a strongly coloured ion such as potassium permanganate, it's a bit difficult to see when all the solid has gone into solution, because the colour of the solution is so dark. If you have access to an ultrasonic bath, sonication for a few minutes will also do the trick. Sonication in soapy water is also the best way to clean jewellery.