No, soap isn't necessary to remove salt from hands.
Soap is an amphipathic substance, that is, it has a polar part and a non-polar part.
In view of this, this substance is very necessary for cleaning hands when they are dirty with something nonpolar, such as oil, as it can bind to the dirt molecules and leave in the water.
In the case of salt, as it is not a non-polar substance, just water is enough to clean salt from your hands.
Learn more about saponification and soap in: brainly.com/question/14018257
