Question

If you are a mixture of ammonium chloride, barium sulphate and sodium chloride how would you produce a pure dry sample of each of those chemicals for the mixture.
Heat the solid. NH4Cl will sublime; the vapor can be condensed and recovered. Add water to dissolve the NaCl and filter. BaSO4 is not soluble. Evaporate the water to collect the crystals of NaCl. You can build on this by filling in the spaces. This is just a rough outline.

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