How can a mixture of ammonium chloride,KCl,lead(2)chloride could be separated in the laboratory
Since KCL is soluble in water and lead(ii)chloride is not, the first technique will be filtration, since ammonium chloride is said to sublime when heated, the next technique will be sublimation then evaporation to retain the KCL
KCL can also be obtained from the mixture by sublimation
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Class assignment
To separate a mixture of ammonium chloride, KCl, and lead(II) chloride in a laboratory, you can use a combination of techniques such as filtration, precipitation, and distillation.
Here is a step-by-step explanation of the process:
1. Filtration: Start by dissolving the mixture in water to create a solution. As ammonium chloride and KCl are both soluble in water, while lead(II) chloride is not, you can filter the mixture to separate the insoluble lead(II) chloride. Set up a filtration apparatus, such as a funnel or filter paper, and pour the mixture through it. The lead(II) chloride will be retained, while the ammonium chloride and KCl will pass through as filtrate.
2. Precipitation: After filtration, you will have a filtrate containing both ammonium chloride and KCl. To separate these two compounds, you can perform a precipitation reaction. Add a solution of silver nitrate (AgNO3) to the filtrate. This will cause a white precipitate of silver chloride (AgCl) to form. Ammonium chloride, being a salt of a weak acid (NH4Cl), will remain dissolved in the solution. Silver chloride can be collected by filtration.
3. Distillation: The remaining solution, containing the ammonium chloride, can be further separated by distillation. By heating the solution, the water will evaporate, leaving behind solid ammonium chloride. This process is known as thermal decomposition.
Once the distillation is complete, you will have successfully separated the mixture. The lead(II) chloride can be obtained by filtration, the silver chloride through precipitation, and the ammonium chloride through thermal decomposition.