I really need help with this. Can somebody answer it please? 4. The reaction of

Question

I really need help with this. Can somebody answer it please?

4. The reaction of aqueous solutions of barium chloride and sodium sulfate results in the formation of a precipitate of barium sulfate. Sodium chloride is also formed but is soluble in water Why would you use filtration to isolate the barium sulfate rather than evaporation or recrystallization? Explain your answer. 5. Sodium chloride, calcium carbonate and vanillin are three of the chemicals encountered in this experiment. Name some applications of these chemicals around the house.

Explanation / Answer

4. BaSO4 is a solid precipitate and NaCl in dissolved in the water. If you evaporated the water, you would be left with a mixture of NaCl and BaSO4.

To recrystallize BaSO4, you would first have to isolate it (by filtration), then dissolve it and allow it to recrystallize. Why not just filter was wash out any adhering NaCl (or unreacted reactant).

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