This is quite simple to do. Barium sulfate is insoluble in water and sodium chloride is soluble in water. So this is what you do. Dump them both in water. As I said the NaCl will dissolve. Then do vacuum or suction filtration. That will filter out the barium sulfate from the solution. Now the two are separate. To get the NaCl out of the water just boil it off. Solution This is quite simple to do. Barium sulfate is insoluble in water and sodium chloride is soluble in water. So this is what you do. Dump them both in water. As I said the NaCl will dissolve. Then do vacuum or suction filtration. That will filter out the barium sulfate from the solution. Now the two are separate. To get the NaCl out of the water just boil it off..