From solution I expect you mean.
The really quickest way is to evaporate the solution off, and thus it will leave the salt crystals behind.
From this tests can be carried out to see what salt it is, these are tests for ions.
Such tests include a flame test. If the flame changes to yellow when the compound is burnt then it suggests the precense of sodium ions, lilac for potassium ions and so on.
You could also do a precipitation aswell as a test for chloride ions ect.
how to remove salt from plastic
It is not correct.
salt is a solid but water is a liquid
remove the salt
You can't really remove the salt, you could get rid of some of the salt squeezing it with something lightly.
Evaporating the water will not remove any of the salt. Only the water molecules will evaporate. The salt will stay in the container.
The salt will absorb the water.
The taste
desalination process is used to remove salt and the large boiler are used for it
Evaporation is one way to remove salt from water. You can also use vacuum distillation as a process of removing salt from water.
kidneys
no