Let's say that the ground water is contaminated with barium ions caused by a barium chloride spill. We could add sodium sulfate to cause barium sulfate to precipitate according to the following balanced equation: BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (8) + 2 NaCl (aq). Aqueous ions are too small to filter, but a precipitate is not too small. Now, the BaSO4(s) can be filtered out of the water. Does this procedure remove all of the barium ions from the water? Explain.​