While diluting a solution of salt in water, a student by mistake added acetone (boiling point ). What technique can be employed to get back the acetone? Justify your choice.
Solution:
If we mix two liquids of significant different boiling points, we can separate them by process of distillation.
Generally, this technique is used if difference in boiling point is more than .
Here the difference in boiling point of salty water and acetone is more than .
On heating, the acetone will start boiling and we can collect the vapour and condense it back in acetone liquid.
Finally in the pot, we will left with only salty water.