there are many techniques to it. The best can be heating the solution till the time the solution gets evaporated and it leaves behind the salt.
Boil the water off. It leaves the salt behind.
Put them in water. Sugar dissolves, sand remains Filter the solution to separate sand and salt. Evaporate solution with dissolved salt to get salt back
Yes
Evaporate the liquid.
No, it cannot separate salt from a salt solution. This is because salt is soluble in water.
it depends upon solution. to separate sugar solution and salt solution u can use crystallization
Boiling off the water from a salt solution will separate the solid salt and water (which can be collected by a condenser).
filtration
Destiling or reverse osmosis.
You can use evaporation to separate salt from a solution of salt and water.
A solution is a special kind of mixture. So yes, a mixture of salt and water could be called a solution. All of the salt would need to dissolve, though ... if there's undissolved salt in there, it's not a solution.
Boil away the water and the salt will be left.