1) You can decant the sand from the water, and the water can be filtered to get cleaner water.
2) You can boil or evaporate the water and the salt will be left behind as a solid.
3) You CANNOT filter salt water, the reason that you can't is because the salt is already dissolved into the water thus making boiling the water so the evaporation will rid the water the only way.
4) Distillation is how you can evaporate the water, leaving the salt behind but also keep the water.
5)
a) FILTRATION is the process of removing or "straining" a solid (the chemical term is precipitate) from a liquid by the use of filter paper or other porous material.
b) DISTILLATION is the purification of a liquid by heating it to its boiling point, causing vaporization, and then condensing the vapors into the liquid state and collecting the liquid. Separation of two or more liquids requires that they have different boiling temperatures. All boiling temperatures can be reduced by decreasing the pressure on the liquid.
Hope this helps man and good luck!
