Chemistry Experiment.
1. We make a mixture of 25 mL water, 1 g salt, 1 g sand.
2. Use filter paper to decant the liquid and let it drop on to watch glass.
3. Evaporate the water.
4. Remove the residue (salt) from watch plate.
So at the end I was only evaporating salt water, the sand was caught in the filter paper, and left in the beaker.
Shouldn't be. NaCl is not volatile at anything close to STP.
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