why potassium permanganate purple in colour?
359049
potassium permanganate becomes pink if it is diluted more and more.\nand it is pink because of d-d transition.
1036267
Potassium permanganate is used as an oxidizing agent in many different kinds of chemical reactions in a laboratory and in industry.[1] It is also used as a disinfectant and in deodorizers. It is used to treat some parasitic diseases of fish, and used in treatment of drinking water, as well as an antidote in phosphorus poisoning. In Africa many people have used it to soak vegetables and lettuce to neutralize any bacteria that may be present. It can be used as a reagent for the synthesis of many different kinds of chemical compounds. For example, a dilute solution of KMnO4 can convert an organic compound with a carbon-carbon double bond into a diol (glycol) compound. Stronger permanganate solutions can oxidize a methyl group on an aromatic ring to a carboxyl group. In analytical chemistry, a standardized aqueous solution of KMnO4 is sometimes used as an oxidizing titrant for redox titrations due to its deep purple color.\n\nDeep purple-colored permanganate can be reduced to the faintly pink Mn+2 cation in an acidic solution, where Mn is in a +2 oxidation state. In an neutral solution, permanganate is only reduced to MnO2, a brown precipitate in which Mn is in a +4 oxidation state. In an alkaline solution, it is reduced to +6 oxidation state, giving K2MnO4.\n\nKMnO4 can be used in an oxidative reaction with pseudoephedrine hydrochloride to produce methcathinone, a Schedule I drug in the United States. Consequently the DEA has restricted its use and sale by classifying it as a List I controlled precursor. Potassium permanganate is listed as a Table I precursor under the United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances(Red list).\n\nDilute solutions are used as a mouthwash (0.25%), disinfectant for the hands (about 1%) and treatment for mild pompholyx dermatitis or fungal infections of the hands or feet.\n\nIn aqueous solution was used as together with T-Stoff (i.e. 80 % hydrogen peroxide) as propellant for the rocket plane Messerschmitt Me 163. In this usage, it is known as Z-Stoff. This combination of propellants is still used in torpedoes.\n\nIt is used as a reagent to determine the Kappa number of wood pulp
806627
This is partially true, partially false.\n\nWith regards to purple, most people would agree that purple light is always some mixture of reddish and bluish light.   I.e. you can imagine two knobs, one raising and lowering the red and the other raising and lowering the blue, and you can get many shades of purple.  There may be other hues added in as well, but there is *always* red and blue (if not, we rarely call it purple).\n\nIn other words, if we didn't have the word "purple" in our language, we would probably call it something like "reddish blue" or "bluish red".\n\nBut we cannot do the same with red and green.   We have a very hard time imagining, or pointing to, a color that is "reddish green".  If given only a red and a green knob, the result will be make the color more or less neutral (gray or white).\n\nLikewise with blue and yellow.  (Some people will respond that green is bluish yellow, but that's because many people are used to mixing pigments on paper ... we're talking about mixing lights.)\n\nThese two pairs,  red-green and blue-yellow, are *fundamental* pairs.  We call them "oppositional".  (There is also a third opponent pair ... light-dark ... but as we're just talking about color here, we can ignore that one for the moment.)  This is called the "opponent theory" of color vision and is associated with Ewald Hering.\n\nSo in that sense we can call these four colors "fundamental" hues"  because all color we see can be mixed using knobs of these four colors.\n\nPeople will also wonder about the red-green-blue primaries, and the fact that we know we have red, green, blue photoreceptors in our eyes.  These would also seem to be fundamental hues (as evidenced by the computer monitor on which you are reading these words ... that monitor is able to simulate a wide range of colors using just red, green, and blue).\n\nThese two theories ... the "opponent theory" and the "trichromatic theory" competed for a long time until we found a way to reconcile them.  Basically, we have three types of photoreceptors, but they are wired in a way in our retina, that by the time signals are travelling down our optic nerve, the red-green are antagonistic signals as are yellow-blue.
198892
There is no such colorimetric estimation but there is a way to identify if your test is not going wrong. U need to look into the colour when it is becoming greenish from orange (that of potassium dichromate+mixtures). If it turns to green then add some more dichromate (please note that u should be aware of how much you are adding). Then continue your test. This might give you result.
1003025
im getting purple and green!!!
966493
well, there's also potassium permaganate. ( which is a black powder/specks) you could cover your shirt in black beads or crystals which would look pretty unique!
346709
Historically, the color purple has been associated with royalty and power, but did you know that the secret of its power lies in the glands of tiny shellfish creatures?\n\nI first heard about this on some History Channel special about a year ago.   And the following is from a web site that has the full history of the color purple:\n\n"The earliest archaeological evidence for the origins of purple dyes points to the Minoan civilization in Crete, about 1900 B.C. The ancient land of Canaan (its corresponding Greek name was Phoenicia, which means “land of the purple”) was the center of the ancient purple dye industry.\n\n“Tyrian Purple,” the purple dye of the ancients mentioned in texts dating back to about 1600 B.C., was produced from the mucus of the hypobranchial gland of various species of marine mollusks, notably Murex. It took some 12,000 shellfish to extract 1.5 grams of the pure dye. Legend credits its discovery to Herakles, or rather to his dog, whose mouth was stained purple from chewing on snails along the Levantine coast. King Phoenix received a purple-dyed robe from Herakles and decreed the rulers of Phoenicia should wear this color as a royal symbol."
163232
"red" cabbage juice is purple normaly, in acid turns red to fucha, and in base turns blue to teal... the mild acids show red, stronger ones show fucha or pink... the mild bases show blue, while stronger ones show teal or sky blue.\n\nI showed this trick to my mom who teaches kindergarden, and she used it for "kitchen chemestry"  cabbage juice + vineagar makes a pink liquid... add baking soda, turnds blue and fizzes...  Her class loved it.
74307
The permanganate is reduced to Mn2+ and the oxalate is oxidized to CO2.\n\n2 MnO4- +  5 C2O42-  +  16 H+ =  2 Mn2+  +  10 CO2  +  8 H2O\n\nYou obviously know enough to ask the question so I'm assuming you can maneuver the numeric placements appropriately.  This forum does not allow me to sub or super set characters.
167726
potassium can form many compounds. such as KCN KCl KOH et cetera.
413258
It's no use trying to find that out. Those conditions are to be fully controlled to get "non-colored" products.\nAnd be careful with what you use in food products!!
614595
the most common salt that burns purple is salts with potassium. I'm not sure what gives a black flame test, but sugars such as glucose and surcrose definately "burns" black.
22494
Potassium Permanganate is an oxidant which will accept electrons depending on the pH at the time of the reaction. In neutral to alkaline solutions, it will form insolubile manganese oxide (MnO2), accepting three electrons, in acid solutions it will form Mn2+ ions.\n\nOxalate is an organic acid rest with a C-C bond and the sum formula (CO2)2 2-. It reacts as a reductive agent and will donate two electrons and accept negative charged two Oxygen atoms (from the water or the Permanganate), forming two carbonate ions.\n\nStrictly speaking, not carbon dioxide but dissolved sodium and  potassium carbonate will be the product of the reaction.
682281
not really sure why, but if you let air get to vanilla, it turns to a darker color. so it probably has some kind of preservative in it making it that way...( just a guess)
1150818
All other common amino acids have a primary amino group. The primary amino group is essential for the formation of the purple chromophore.\nProline has a secondary amino group so the reaction is different\n\nHave a look at the link below
262227
any oxidative substance (potassium permanganate), ultraviolet rays, sun, air, hydrogen peroxide, etc
268974
Coz chlorophyll interacts with the iodine soln and the purple colour will not be clearly visible Instead u will end up in black colour.