in science, how do you separate alcohol and water?
952503
By applying heat, the alcohol can be boiled off below the boiling point of water, and recondensed, leaving the water behind.
565188
water is  H2O, it's two separate element on the periodic chart - H for hydrogen and O for oxygen.
89817
a simple distillation unit can be made using a bucket or nother resevior and placing plastic or plexiglass slightly above it at an angle that will direct the water that condensates on the glass into another container. this however will only remove the minerals. the water changes to a gas and then condense on the glass into a liquid again, the minerals do not
884674
Distill it.\n\nIn cooking, supposedly you can put a piece of raw potato (sometimes, the hint says a piece of lettuce) in food that's too salty and it takes the salt out.  But I don't know if that works.  I'd go with distillation.  \n\nDistillation is where you boil a liquid and then catch the vapor and condense it.  In the case of salt water, the vapor would be plain water with nothing dissolved in it (the salt gets left behind in whatever you use to boil the liquid in.)  Distillation is also used to make an alcoholic liquid more alcoholic.  I guess the alcohol gets vaporized and condensed.
1158356
By itself, water is an unreactive substance by nature. So you cannot separate oxygen and hydrogen from the water molecules. However, there is only one ay in hich this canbe done: electrolysis.\n\nIt involves the passage of an electric current into a liquid, which naturally conducts electricity. Electrodes are used to pass the electric current. At both the electrodes, gases are evolved, depending upon the liquid.\n\nSome acid or alkali should be added to water for the evolution of gases, namely hydogen and oxygen at the electrodes.\n\n\n\nIt can be mass-produced, but the process is too costly. An application could be to use hydrogen in hydrogen powered cars to replace the more polluting petrol powered cars. \n\nMoreover, oxygen is also obtained by the fractional distillation of liquid air. It involves cooling air by decreasing the its pressure by placing them in special containers, capable of bearing atmospheric pressure. This process is more economical, compared to electrolysis. Liquid oxygen and hydrogen is used to power rockets in order to propel them into space. This process for the production of liquid oxygen and hydrogen is mass produced nowadays to power rocket and hydrogen powered cars. \n\nThanks
783778
Given that kerosene and water are not miscible, and have a different density, a centrifuge could separate the two liquids.\nAlso, since water boils at 100 C and freezes at 0 C, while kerosene will boil at more than 150 C and freeze at less than 0 C, then heating of chilling the substance would allow distillation separation, or the creation of a hydrocarbon water slush that could be treated fop separation.\nYour best best is distillation, still.  That is how crude oil (which does contain water) is treated anyway.
696442
It would depend on what the nature is of the unwanted impurities. One could use chemical separation or distillation.  Distillation would be the easiest.
161590
Most over the counter rubbing alcohol is 70% isopropanol alcohol 30% distilled water.\n\nSurface tension can be measured with scientific devices called Tensiometer.\n\nPure water has a surface tension of 72 dynes/cm. If a solution containing an alcohol concentration of 10% to 25% the surface tension will be reduced to 35-45 dynes/cm \n\nRubbing Alcohol has a much higher concentration so it would reduce the surface tension even more.  Soap is another compound that reduces the surface tension of water.  Typically compounds that do this kind of thing are called Surfactants.  \n\nSurfactants interact with water by disrupting or modifying the hydrogen bonding network of water. Since this reduces the cohesive forces in water, this leads to reduction in the surface tension
95618
basically you're talking about distilling water, which is a purification technique.  collect the water vapor and let it condense. the result is pure water.
109626
the production of alcohol is an anoxic reaction, if oxygen is present alcohol isn't produced. This is usually achieved by putting the fermentation mixture in a sealed flask with a water stopper in the top, this allows the escape of CO2 produced in the fermentation but doesn't allow O2 in the air to dissolve in the water
343931
mix 50 % alcohol and 50 % distilled water. Apply with a soft cloth.
311126
I'm not exactly sure what you're talking about, but yes, water can be separated into hydrogen gas (H2) and oxygen gas(O2). It's the following redox reaction.\n\nreduction: 2e- + 2H+ + H2O --> H2 + H2O\noxidation: 2H2O --> O2 + 4H+ + 4e-\n\nMultiply the reduction reaction by two and add the two together to get the final reaction.\n\n2H2O --> 2H2 + O2\n\nThe hydrogen goes down from a +1 state to a 0 state, and the oxygen goes up from a -2 state to a 0 state.
289697
At room temperature and 1 atmosphere of pressure air is much less dense than water.  So, even if the molecules in air/perfume are moving at the same rate as those in the water/alcohol mixture, the perfume molecules will go farther before they collide with an air molecule.  Thus, perfume in air will diffuse much faster than alcohol in water.  \n\nBTW, I must correct blackdragon's comment that alcohol does not mix with water.  Most common short chain alcohols, such as methanol (wood alcohol), ethanol, and isopropanol mix well with water.  Ethanol is the alcohol in beer, wine, and other alcoholic drinks.
426332
Alcohol alcohol alcohol.
1128825
rubbing alcohol - isopropyl alcohol, 2-propanol\nCH3CHOHCH3
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.
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.