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.

To produce a pure dry sample of each chemical from the mixture, you can follow the process of separating and purifying each component. Here's a step-by-step guide:

1. Dissolution: Start by dissolving the mixture in water. The water will dissolve sodium chloride (NaCl) and ammonium chloride (NH4Cl), but barium sulphate (BaSO4) is insoluble and will remain undissolved.

2. Filtration: Use filtration to separate the insoluble barium sulphate from the soluble sodium chloride and ammonium chloride. You can employ filter paper or a filtering apparatus to remove the solid BaSO4 from the liquid filtrate.

3. Evaporation: Now, you have a solution containing sodium chloride and ammonium chloride. To isolate them individually, heat the solution to evaporate the water. As the water evaporates, sodium chloride and ammonium chloride will start to crystallize.

4. Crystallization: Allow the solution to cool down slowly to promote the formation of pure crystals of sodium chloride (common table salt) and ammonium chloride. This process ensures the growth of large, solid crystals that are easier to handle. Collect the crystals by filtration or decantation.

5. Drying: Once the crystals are collected, you need to dry them to remove any remaining moisture. Spread the crystals on a clean, dry surface and leave them to air dry, or you can use gentle heating to accelerate the drying process. Be cautious not to exceed the melting point of each respective compound.

By following these steps, you should obtain pure dry samples of ammonium chloride, barium sulphate, and sodium chloride from the initial mixture. Remember to practice proper safety measures when handling chemicals, and if unsure, consult a professional or refer to specific references or protocols.