Briefly Describe A Suitable Laboratory Procedure Of Seperating A Mixture Of Nacl,Nh4cl,Pbcl2

electrolysis

To separate a mixture of NaCl, NH4Cl, and PbCl2 in the laboratory, you can follow the steps below:

1. Dissolving the Mixture: Start by adding water to the mixture in a beaker, ensuring that all the components are well-submerged. Stir the mixture to aid in the dissolution process. NaCl is highly soluble in water, while NH4Cl has moderate solubility, and PbCl2 has low solubility. Therefore, water is an appropriate solvent for this step.

2. Filtration: After the components have dissolved, use a filter paper and a funnel to separate the solid particles from the liquid. This will separate the insoluble PbCl2 from the solution, which will pass through the filter paper as the filtrate. The residue on the filter paper would contain only PbCl2.

3. Precipitation of NH4Cl: To precipitate NH4Cl from the filtrate, heat the solution gently until most of the water evaporates. The remaining solution will become concentrated, resulting in the formation of crystals as it cools down. Collect these crystals of NH4Cl through filtration or by allowing them to settle at the bottom of the beaker.

4. Evaporation: The remaining filtrate would contain NaCl. To obtain solid NaCl, the remaining solution can be heated further until all the water evaporates. As the water evaporates, NaCl crystals will form, which can be collected by scraping them off the evaporating dish or beaker.

Now, you have successfully separated the mixture into its individual components. The residue from the filtration step contains PbCl2, the crystals obtained during the precipitation step are NH4Cl, and the solid obtained after the evaporation step is NaCl.