why do we use ethanol for purification of  potassium nitrate instead of water?
444550
The difference in solubility of the components allows for separation.  I don't remember the specifics, but that is the reason.  Water will not have a big enough difference.
184549
The first website explains *how* to make a\nmirror using "nitrate of silver", water, and ammonia.\n\nThe second website offers "nitrate of silver" for sale.
954456
Well use a series of steps.\n\n1st step add Calcium Carbonate. This will fizz in the case of the vinegar, as acid plus carbonate gives salt, water and carbon dioxide. U can even test the gas to be CO2, as it turns lime water milky. U will eliminate the vinegar from further tests.\n\n2nd is separate the alcohol from the salt and fresh water. Do this by testing with Cobalt chloride paper. The paper changes from blue to pink if any water is present. The sample which doesn't change the paper would be the alcohol.\n\n3rd is to separate the salt water from the fresh water. Do this by adding silver nitrate followed by aqueous ammonia. Salt contains sodium chloride, so the presence of the Cl- ion will cause the formation of a white precipitate that dissolves in excess alkali.\nSo, the one that produces no ppt is therefore pure water.
762086
In Medical terms, it is used for ethanol (alcohol)
833323
The most obvious reason is because it evaporates so quickly.  The cooling that takes place during evaporation causes water from the atmosphere to condense on it's surface.  This would lead to "wet" crystals.\n\nAlso, upon filtering the purified organic crystals you would see "ice crystals" form on the filter paper as the diethyl ether evaporated.\n\nA practical reason is because it is not one of the better solvents for most organic materials that one would wish to purify by recrystallization.  Alcohols are better for polar materials and benzene, dichloromethane or a petroleum hydrocarbon are better for others.\n\nIn terms of student lab, the anesthetic effects of the ether must also be considered.
803319
Potassium Permanganate dissolves easily in water.  Iodine is only slightly soluble in water, but it dissolves really well in non-polar solvents such as ethanol, dichoromethane, etc.
661934
http://www.ask.com/web?q=why+is+it+important+to+avoid+contact+of+KMnO4+and+ethanol%3F+&qsrc=0&o=0
1166443
It is not possible to obtain absolute alcohol by simple fractional distillation, because a mixture containing around 95.5% alcohol and 4.5% water becomes an azeotropic mixture. In one common industrial method to obtain 100% pure alcohol, a small quantity of benzene is added to rectified spirit and the mixture is then distilled. Because a small amount of the benzene used remains , the solution is carcinogenic. So production of absolute alcohol is done by desiccation using glycerol. Alcohol produced by this method is known as spectroscopic alcohol.
264119
Aside from the fact that it boils at -33.5°C, ammonia is a polar molecule, so it's best solvent use would be with other polar molecules, and water and alcohols would be far better solvents.  I would classify it as a poor solvent since it would be hard to use because you would have to keep it very cold, and there are better solvents you could use.\n\nUses:  Fertilizer (as mentioned previously); manufacture of nitric acid, hydrozine hydrate, hydrogen cyanide, urethane, acrylonitrile and sodium carbonate (by Solvay process); refrigerant; nitriding of steel; condensation catalyst; synthetic fibers; dyeing; neutralizing agent in petroleum industry; latex preservative; sulfite cooking liquors; fuel cells; rocket fuel; yeast nutrient; developing diazo films.
407688
Couldn't you evaporate the solvent? I think it's water or ethanol.
53184
methanol (rubbing alcohol);\n\none carbon, attached to one oxygen, with hydrogen everywhere else\n\nethanol (drinking alcohol);\n\ntwo carbons attached, one oxygen, with hydrogen everywhere else\n\nethyl ketone (very bad variation on ethanol, which is naturally occuring)\n\ntwo carbons attached, an oxygen attached by double bond, and hydrogen (one less hydrogen) everywhere else
848275
It is made from methanol, which is poisonous.  The safe alcohol is ethanol.
866213
KH2 is potassium hydride. This is not absorbable by plants. The phosphate is though (PO4).\n\nGo find yourself a good N-P-K fertilizer.
233245
It depends on the type of alcohol and whether its single component or multicomponent based. if it is simple and short chain alcohol (low boiling pt) by simple distillation it can be separated.  If there are mixture of alcohols and long chained then you need to convert them into ester/salt, which would ease the separation process.
4591
sugars + yeast + water = ethanol ;I wouldn't drink it though unless you know what you are doing. There is always the possibility of methanol contamination that's the reason for distillation. IF YOU DRINK IT YOU COULD GO BLIND!!!
659987
Depending on how much ethanol spilled. Ethanol is the same alcohol that is in wine, beer and liquor. Spilling\na significant amount in water will make the occupants drunk.\nSpilling a really significant could make them dead.\n\nAs far as ethanol giving off less CO2 than burning gasoline - it may give less. However, there is a tremendous quantity of CO2 given off in the fermentation process. I am curious whether there is any real green-house gas advantage.
387966
The classical method is called Karl Fischer titration.\nIt's a little complex, but it's the generally accepted standard way assaying water content.\n\nThe overall reaction is:\n\nI2 + 2H2O + SO2 --> 2HI + H2SO4\n\nThis is done in the presence of a nitrogenous base (usually pyridine) to neutralize the acid produced. An anhydrous alcohol (often methanol) is used as the solvent. \n\nThe KF reagent is made by dissolving the base, I2 and SO2 in the desired alcohol. The sample is dissolved separately in the same alcohol. The KF reagent is then titrated into the sample solution until the I2 is no longer consumed. If you know how much I2 was required, you can calculate how much H2O was present in the sample.\n\nIn practice, there are machines which fully automate this process, so all you have to do is add your sample and wait for the results.\n\nYou can also weight your sample, dry it in an oven, weigh it again, and assume the difference in weight is due to loss of water. While this method will give an estimate of moisture contant, it doesn't have nearly the same accuracy, precision or specificity as the KF titration.