Can water be isolated from alcohol solution through evaporation?
ordinary evaporation will not be able to completely separate alcohol and water.repeated fractional distillation is generally used.you cannot find the volume of alcohol just by measuring the water volume.you may get an approximate idea.generally if you mix 1 litre of water and 1 litre of alcohol you will not get 2 l of mixture.as alcohol molecules occupy the space between water molecules.
It is called distillation, you boil the alcohol out but you channel the steam through a chilled tube that condenses it and lets it drip into a flask at the bottom of the tube. When you mix one liter of water with one liter of alcohol you do not get 2 liters, they mix kind of like salt and water giving a smaller volume around 1.9 liters. Also you will have lost some of the alcohol that did not re-condense in the tube, so you must measure the amount of alcohol that dripped out of the condensing column.
