Separate
Salt And Sand
Needed:
- Salt
- Sand
- Water
- A cooking vessel
- A stove or hot plate
Experiment:
Measure equal amounts of salt and sand and then mix them
thoroughly. Place the mixture in a pan and add water. Heat the
water until all the salt dissolves. Allow the sand to settle
to the bottom of the pan and then pour off the salty water. Remove
the sand from the pan and put the salty water back in. Boil the
water away, leaving only salt in the bottom of the pan.
Explanation:
The sand does not dissolve in the water as the salt does.
The salt does not boil away as the water does. Will this
work with a mixture of sugar and sand? What about sugar
and salt?
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