Here’s something for those of you who would like to do something with what you can find lying around in your house.

Try making saturated solutions of common salt and sugar in water. A saturated solution is one in which you cannot dissolve any more of the solid, at that temperature. To prepare a saturated solution of salt in water, take a cup of water, keep adding one or two spoonfuls of salt at a time, keep stirring and adding more salt when it completely dissolves. You will reach a point when some salt is left undissolved at the bottom, no matter how much you stir. Then it is saturated.

You can try various things with the saturated solution and observe what happens.

  • Drain off the clear solution into a second cup, leaving behind the undissolved salt/sugar in the first cup. Leave the solution to evaporate for a couple of days and see what happens. You could try using different kinds of vessels to do the evaporation- wide, shallow saucers, or deep bowls- and see whether it makes a difference.
  • Try freezing the solutions by keeping inside the refrigerator.
  • Try heating the solutions to evaporate the water.

CAUTION: ANY HEATING SHOULD BE DONE WITH THE HELP/UNDER THE SUPERVISION OF PARENTS.

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