If you want to separate the salt from the water you have to use distillation. Water has a lower boiling point than salt so heating the solution and then waiting for evaporation will separate the salt
Students are to mix the solvent to dilute completely,and get and evaporation dish,candle(heat),tripod stand...pour the solution in the evaporation dish and place it on tripod stand above the candle wait for some time the water will change into gas and to get the water they have to cover the evaporating and direct it to a different container to get the water and salt
