To Study the Properties of a Suspension
If we shake some chalk powder with water in a beaker, a milky suspension is formed. We can see the fine particles of chalk suspended throughout the water without dissolving in it. If this suspension of chalk and water is kept undisturbed for some time, the chalk particles settle down at the bottom of the beaker.This means that chalk and water suspension is unstable. If we filter the suspension of chalk and water, the chalk particles are left behind as a residue on the filter paper and clear water is obtained as a filtrate. This means that chalk and water suspension can be separated into chalk and water by filtration. And if a beam of light is passed through a chalk and water suspension, it scatters the beam of light and renders its path visible inside it. From this discussion, we get the following properties of a suspension.
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Matter in Our Surroundings - Notes
1. 11. Metals Usually Have a Silver or Grey Colour
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2. The Case of a Liquid Solute Dissolved in a Liquid Solvent
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8. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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9. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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10. 1. Separation by a Suitable Solvent
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11. 6. Metals are Usually Strong. They Have High Tensile Strength.
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18. Chemical Formula for daily use material
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20. 4. Metals are Lustrous (or Shiny), and can be Polished.
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22. To Study the Properties of a Compound of Iron and Sulphur
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28. To Separate a Mixture of Alcohol and Water
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31. 3. Metals are Good Conductors of Heat and Electricity.
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32. To Study the Properties of a Solution
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33. 7. Metals are Solids at the Room Temperature
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34. To Study the Properties of a Colloid
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42. To Separate the Salt-Water Mixture (or Salt-Solution)
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43. To Study the Properties of a Suspension
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45. Experiment to Obtain Coloured Component (Dye) From Ink
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49. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
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50. To Study the Properties of a Mixture of Iron and Sulphur
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