How to Separate a Mixture of Sugar and Water?

The easiest way to separate a mixture of sugar and water is to use distillation, a process that separates substances based on their different boiling points.

Sugar does not boil, but the point at which it crystallizes (320 degrees Fahrenheit) is much higher than the boiling point of water (212 degrees Fahrenheit), so when you boil a mixture of sugar and water, the water turns to steam and leaves the sugar behind.

You can collect the steam to capture the water, effectively separating the sugar and water. If you are keen to learn more about distillation, evaporation and crystallization, this process, involves all three.

How would you separate sugar from water?

Sugar is hygroscopic and begins to decompose at just over 180°C (~320-365°F). The problem you would have with your proposed method is that to remove the last remnants of the water you have to heat well above the water’s boiling point.

Google “make caramel” if you can’t imagine what’s going to happen. Even very little decomposition of your sugar means you’re leaving an impure solid behind. Back to top. The reason you can just boil the water out of the salt is that it is much more stable and can be safely heated to much higher temperatures.

So, there are a few ways to separate these two ingredients, depending on your end goals:

  • To collect only solutes (sugars): Heat over very low heat to evaporate as much water as possible to get a saturated solution. Then crystallize and filter sugar (in the lab you would wash with a suitable solvent and dry under vacuum)
  • To collect only the solvent (water): distill over moderate heat to collect water. In order to collect as much as possible, the heat used to boil off the solvent must be slowly increased, especially as you approach the final portion.
  • To collect both solutes (sugar) and solvent (water): you would first remove the solid and then distill the solvent. Unless you start with a saturated solution, you would need to do a partial distillation to remove some solvent, then crystallize your sugar, and then complete the distillation. They would still leave an awful brown gummy residue.

How to Remove Sugar from Water Without Heating

There are several ways to get the sugar back from sugar solution, without heating.

-You can keep the solution in a pan or bowl without a lid. The water will be lost slowly as the refrigerator dehumidifies the materials kept inside.

-You can keep it in a wide open pan or bowl and keep it somewhere there is enough air circulation. If you do not want any contaminants, take enough precaution. The water will slowly evaporate and you get your sugar back.

By the way why do you want to do that?

How can we separate sugar from the mixture of sugar and water like we can remove acetone from water?

The mixture of sugar-salt solution can be separated by evaporation. If the water is completely evaporated, we will get separated sugar from the mixture. If we dissolve the mixture in alcohol, we will get the salt separated while sugar will be dissolved in alcohol. After that, the solution is further filtered and salt will be the residue of the solution.

Then evaporate the solution of alcohol and sugar. Lat will receive the sugar as the residue after the evaporation of alcohol completely.