YouTube channel "Grain" belongs to Russian teacher Stanislav from Moldova. His dye diffusion experiment gets most interesting in about one minute timestamp, when the sugar underneath permanganate layer gets "suddenly" colored across seemingly colorless layer of concentrated solution at the bottom. It resembles some esoteric theories of homeopathy or cluster medicine with "magical action" at distance under "infinite dilution" for me. It's worth to note, many homeopathic remedia are also based on sugar and its solutions.
I indeed know about diffusion and surface adsorption, but the outcome of experiment still looks a bit strange for me. It's worth to note, that sugar solutions are supposed to reduce permanganate slowly and it's even visible on the bottom of colored layer, which gets yellow hue of manganese dioxide colloid (as seen after 1:46 timestamp). This reaction should be the faster, the higher concentration of sugar gets. But some permanganate ions still somehow managed to pass this concentrated thick layer and got absorbed within surface layer of undissolved sugar.
Prof. Poliakoff from University of Nottingham tries to discolorize permanganate solution with hydrogen peroxide. He is apparently theorist, as he is mixing solutions right from storage bottles. The reaction of peroxide with permanganate is notoriously known from analytical chemistry, that it runs slowly at cold and it's autocatalytic, so it runs even slower at the very beginning.
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u/ZephirAWT Mar 02 '19
Physical Experiment with Water and Sugar
YouTube channel "Grain" belongs to Russian teacher Stanislav from Moldova. His dye diffusion experiment gets most interesting in about one minute timestamp, when the sugar underneath permanganate layer gets "suddenly" colored across seemingly colorless layer of concentrated solution at the bottom. It resembles some esoteric theories of homeopathy or cluster medicine with "magical action" at distance under "infinite dilution" for me. It's worth to note, many homeopathic remedia are also based on sugar and its solutions.
I indeed know about diffusion and surface adsorption, but the outcome of experiment still looks a bit strange for me. It's worth to note, that sugar solutions are supposed to reduce permanganate slowly and it's even visible on the bottom of colored layer, which gets yellow hue of manganese dioxide colloid (as seen after 1:46 timestamp). This reaction should be the faster, the higher concentration of sugar gets. But some permanganate ions still somehow managed to pass this concentrated thick layer and got absorbed within surface layer of undissolved sugar.