Which salt are you referring too? Table salt, NaCl does. Most salts do, but some sulfate salts do not, such as barium sulfate (BaSO4).
This depends on: volume of water, temperature of water, stirring, crystal dimensions, presence of other substances etc.
Maybe
Add water to the mixture of sand and salt, stir the mixture vigorously, pour off the water into another container, boil water off or let it evaporate. Sand does not disovle and once the you pour off the water and the water is gone all you will have left is the salt.
No. salt water is salt water. it already has salt in it
Salt water
Salt water is denser than fresh (not salt) water.
there is salt in salt water and little salt in fresh water
Water "dissolves" salt. Water does not absorb salt.
Add salt to water to obtain salt water.
no a salt water snail has to be in salt water
Salt water is a solution of salt, containing of course salt.
salt is not from salt water