To Separate a Mixture of Sugar and Sand
Sugar is soluble in water whereas sand is insoluble in water. This difference in the solubilities of sugar and sand in water is used to separate them. This is done as follows. The mixture of sugar and sand is taken in a beaker and water is added to it. The mixture is stirred to dissolve the sugar in water [see Figures 49 (a) and (b)]. The sand remains undissolved.
The sugar solution containing sand is filtered by pouring over a filter paper kept in a funnel [see Figure 49 (c)]. Sand remains as a residue on the filter paper and sugar solution is obtained as a filtrate in the beaker kept below the funnel. The sugar solution is evaporated carefully to get the crystals of sugar. In this way, a mixture of sugar and sand has been separated by using water as the solvent.
Common salt is soluble in water whereas sand is insoluble in water.So,a mixture of common salt (sodium chloride),and sand can also be separated by using water as solvent.This will be similar to the separation of sugar and sand mixture which has been described above. Please note that copper sulphate,ammonium chloride, potassium nitrate and potash alum are also soluble in water, but carbon and sulphur are insoluble in water. Sugar is soluble in alcohol but salt is insoluble in alcohol,so a mixture of sugar and salt can be separated by using alcohol as solvent.We will now separate a mixture of sulphur and sand.
Notes
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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19. 3. Metals are Good Conductors of Heat and Electricity.
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20. To Study the Properties of a Colloid
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21. To Separate a Mixture of Alcohol and Water
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26. To Study the Properties of a Compound of Iron and Sulphur
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28. 4. Metals are Lustrous (or Shiny), and can be Polished.
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33. To Study the Properties of a Solution
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34. 7. Metals are Solids at the Room Temperature
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36. To Separate the Salt-Water Mixture (or Salt-Solution)
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37. 8. Non-Metals Have Comparatively Low Melting Points and Boiling Points
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43. To Study the Properties of a Suspension
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45. Separation Of Mixture Of a Solid And a Liquids
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47. Solutions, Suspensions And Colloids
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