After one hour, equilibrium has been reached which means the potassium permanganate crystals are at an equal concentration throughout the water. Diffusion has stopped. 1 of 3 ...

Slide 1 of 3, A beaker filled with water. A purple lump sits at the bottom of the beaker labelled as Crystals of potassium permanganate. , Diffusion experiment Potassium permanganate is placed ...

Water is typically also treated with a chlorine disinfectant. Potassium permanganate can be toxic at high concentrations, but no health problems were reported in the town.

People described the potassium permanganate particles as black, purple, green, or brown – and indeed they were everywhere. ... Carus said it is used for taste and odor control in drinking water.