Class 9 Exam > Class 9 Notes > Science Class 9 > Procedure - To separate the Components of a Mixture of Ammonium Chloride, Salt and Sand, Chemistry
Procedure - To separate the Components of a Mixture of Ammonium Chloride, Salt and Sand, Chemistry | Science Class 9 PDF Download
| Table of contents |
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| Preparing the mixture of ammonium chloride, sand and common salt: |
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| Separation of Ammonium Chloride: |
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| Separation of sand particles: |
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| Separation of salt: |
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The Procedure:
Preparing the mixture of ammonium chloride, sand and common salt:
Take a small quantity of a mixture of sand, common salt and ammonium chloride in a china dish.
Separation of Ammonium Chloride:
Real Lab Procedure:
- Place the china dish on a wire gauze that is placed over a tripod stand.
- Cover the china dish with an inverted glass funnel and plug in a little cotton at the opening of the stem of the funnel.
- On heating the mixture in the china dish, white fumes evolve and rise inside the funnel.
- Stop heating when the white fumes stop rising and allow the funnel to cool.
- After cooling, remove the funnel from the china dish and using a spatula, transfer the solid ammonium chloride sticking on the walls of the funnel into a watch glass.
Inference:
- Ammonium chloride sublime and can be separated from the mixture of salt and sand by the process of sublimation.
Separation of sand particles:
Real Lab Procedure:
- Transfer the contents of the china dish into a beaker and pour some distilled water into it and stir it well using a glass rod.
- Filter the contents of the funnel into another beaker.
- Transfer the sand particles left on the filter paper into a watch glass using a spatula.
Inference:
Sand can be separated from the mixture of sand and salt by dissolving salt in water and then by filtration.
Separation of salt:
Real Lab Procedure:
- Transfer the filtrate in the beaker into a china dish and strongly heat it.
- After some time, the salt is left as a residue in the china dish; transfer it into another watch glass.
- Finally label the three components that have been separated from the mixture.
Inference:
- Salt can be separated through the process of evaporation.
Precautions:
- Always heat china dish on a wire gauze.
- Plue the opening of the stem of the funnel with cotton while heating substances which sublimate.
- Always separate sublimate from the mixture first or before dissolving salt in water.
- While filtering a solution drop the contents along a glass rod into the funnel.
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FAQs on Procedure - To separate the Components of a Mixture of Ammonium Chloride, Salt and Sand, Chemistry - Science Class 9
| 1. How can I separate ammonium chloride, salt, and sand from a mixture? |  |
Ans. To separate ammonium chloride, salt, and sand from a mixture, you can follow these steps:
1. Dissolve the mixture in water to dissolve ammonium chloride, leaving behind salt and sand.
2. Filter the solution to separate the insoluble sand from the liquid.
3. Evaporate the liquid to obtain solid ammonium chloride.
| 2. What is the purpose of dissolving the mixture in water? | |
Ans. Dissolving the mixture in water helps to separate ammonium chloride from salt and sand. Ammonium chloride is soluble in water, while salt and sand are not. By dissolving the mixture, ammonium chloride can be extracted in the solution form, leaving behind salt and sand as insoluble solids.
| 3. Why do we filter the solution after dissolving the mixture in water? | |
Ans. Filtration is done to separate the insoluble sand from the liquid solution. After dissolving the mixture in water, the sand particles remain undissolved and can be separated by passing the solution through a filter paper. This allows the sand to be retained on the filter paper while the liquid containing ammonium chloride passes through.
| 4. What is the purpose of evaporating the liquid after filtration? | |
Ans. Evaporating the liquid helps to recover the solid form of ammonium chloride. By heating the liquid solution, the water evaporates, leaving behind the solid ammonium chloride. This process is called evaporation and helps in obtaining the separated component in its original form.
| 5. Can the separated components be reused after the separation process? | |
Ans. Yes, the separated components can be reused. Ammonium chloride can be used in various industrial processes, salt can be used for seasoning or other purposes, and sand can be used in construction or as a filtration medium. However, it is important to ensure that the separated components are free from any impurities before reusing them.
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