Decantation
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The document discusses the process of decantation to separate mixtures. Decantation involves either allowing solids to settle and pouring off the liquid or allowing immiscible liquids to separate based on density, with the lighter liquid poured or siphoned off. It provides examples of mixtures that can be separated via decantation, such as oil and vinegar, as well as examples that cannot be separated this way, such as rice and water. The purpose is to obtain a decant or precipitate free of particulates.
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Decantation
Decantation is a method to separate an insoluble solid from a liquid by allowing the solid to sediment to the bottom of a container and then carefully pouring off the pure liquid. The process involves making a mixture of sand and water, allowing it to stand so the sand settles, and then decanting or pouring the water into another container, leaving the sand behind. A risk assessment notes the risks of broken glass and cuts during the experiment and prevention methods of handling glass carefully and not using cracked glassware.
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my slideshare consist of various activities that can easily understand by the pupils and also videos which can be visualize and guide pupils how to do the hands on activity.
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This document discusses different methods for separating mixtures: evaporation/heating, filtration, sieving, sifting, straining, and winnowing. It provides examples of each method and a matching exercise to test understanding of the various separation techniques.
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1. The document discusses different methods of separating mixtures including filtration, winnowing, sieving, and picking.
2. Filtration involves using a filter to separate solid substances from liquids. Sieving and sifting are used to separate solid mixtures where one component has smaller particles than the other.
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1. The document describes various activities to separate mixtures using different techniques like handpicking, winnowing, sieving, decantation, and separating immiscible liquids.
2. Winnowing and sieving are described as methods to separate mixtures where winnowing uses wind or blowing air to separate lighter and heavier components, while sieving uses screens or filters of different sizes to separate particles.
3. Decantation and separating immiscible liquids are also discussed as techniques. Decantation involves allowing insoluble solids or liquids in a mixture to settle, and then removing the supernatant layer. Immiscible liquids are separated based on their inability to mix and form distinct layers.
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This document discusses different techniques for separating mixtures, including using magnets and evaporation. It provides lesson plans and activities about separating mixtures for students. Some key points:
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Decantation
Decantation is a method to separate an insoluble solid from a liquid by allowing the solid to sediment to the bottom of a container and then carefully pouring off the pure liquid. The process involves making a mixture of sand and water, allowing it to stand so the sand settles, and then decanting or pouring the water into another container, leaving the sand behind. A risk assessment notes the risks of broken glass and cuts during the experiment and prevention methods of handling glass carefully and not using cracked glassware.
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Ways of Separating Mixtures
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2. Filtration involves using a filter to separate solid substances from liquids. Sieving and sifting are used to separate solid mixtures where one component has smaller particles than the other.
3. Winnowing separates grains from chaff by throwing materials into the air and allowing the wind to blow away lighter particles. Picking can separate mixtures where the components are large enough to be identified and gathered by hand.
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Magnetism can attract or repel certain materials like iron and steel through an invisible magnetic field. Magnets are made of materials that produce this field and can pull other magnetic objects towards them or repel other magnets. The document then discusses using magnets to separate mixtures by attracting magnetic materials like iron while non-magnetic materials like glass or plastic are not attracted. It explains how this process is useful for applications like removing metal contaminants in food processing or sorting recycling materials.
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2. Winnowing and sieving are described as methods to separate mixtures where winnowing uses wind or blowing air to separate lighter and heavier components, while sieving uses screens or filters of different sizes to separate particles.
3. Decantation and separating immiscible liquids are also discussed as techniques. Decantation involves allowing insoluble solids or liquids in a mixture to settle, and then removing the supernatant layer. Immiscible liquids are separated based on their inability to mix and form distinct layers.
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This document discusses different techniques for separating mixtures, including using magnets and evaporation. It provides lesson plans and activities about separating mixtures for students. Some key points:
- Magnets can be used to separate mixtures when one component is magnetic, like iron filings. This has benefits in food processing, recycling, and sorting industrial wastes.
- Evaporation involves applying heat to cause a liquid in a mixture to evaporate, leaving other components behind. Examples given include salt production, sugar refinement, and producing fish sauce.
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Decantation
- 1. Goal of the Day! Separate immiscible liquids by using decantation.
- 2. Guide Questions: ✢ 1. Whatarethesubstances/materials usedinthe mixture? ✢ 2. Howdid youseparatethe substances? ✢ 3. Whichofthematerialsis consideredaslightand heavy? 2
- 3. DECANTATION
- 4. Meaning ✢ Decantation isaprocessto separate mixtures byremoving aliquid layer that isfreeofaprecipitate. The purpose maybe toobtainadecant(liquid freefrom particulates) ortorecoverthe precipitate. ✢ Apiece ofglassware calleda decanter isused to performdecantation. 4
- 5. . 5
- 6. Separating Liquids and Solids Allowing the solids to settle to the bottom of the mixture and pouring off the particle-free part of the liquid. Separating Two or More Liquids Allowing two immiscible liquids to separate and the lighter liquid is poured or siphoned off. How Decanting Works
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- 8. Guide Questions: ✢ 1. Whatarethesubstances/materials usedinthe mixture? ✢ 2. Howdid youseparatethe substances? ✢ 3. Whichofthematerialsis consideredaslightand heavy? 8
- 9. 9
- 10. ✢ Write YES if the following mixture can be separated through Decantation and NO if not. ✢ _____ 1. Oil and vinegar ✢ _____ 2. Vinegar and soy sauce ✢ _____ 3. Rice and water ✢ _____ 4. Diesoline and water ✢ _____ 5. Melted butter and water How far have you learn? 10
- 11. Write your thoughts Make a journal. Write how decantation help us in our daily living. Sight example. 11
- 12. Thank You!!! 12
- 13. World isn’t BIG ! Just explore! 13