Solubility
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Solubility

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Solubility Presentation Transcript

  • 1. Solutions and Suspensions Solubility and Rate of Dissolving
  • 2. Solubility
    • Objectives:
    • Understand the definition of solubility.
    • Investigate the factors that affect the solubility of various substances.
    • Understand the definition of the rate of dissolving.
    • Investigate the factors that affect the rate of dissolving of substances
  • 3.  
  • 4. Solubility
    • Solubility is the maximum amount of solute that can be dissolve in 100g of solvent at a given temperature
  • 5. Solubility
    • Example
    • What is the solubility of sugar in water at 25  C if 28g of sugar can be dissolved in 250ml of water? (mass of 1ml of water is 1g)
    • Amt of sugar in 1g of water
    • = 28 / 250 = 0.112g
    • Amt of sugar in 100g of water
    • = 0.112 x 100 = 11.2g
    Solubility of sugar in water at 25  C is 11.2g per 100g of water
  • 6. Solubility
    • Example
    • The solubility of salt in oil at room temperature is 25g. How much salt can be dissolved in 200cm 3 oil at room temperature? (density of oil is 0.9g/cm 3 )
    Mass of 200cm 3 of oil = 0.9 x 200 = 180g
  • 7. Solubility
    • Continue…
    • Amt. of salt that can be dissolved in 200cm 3 of oil
    • = 25 x 180/100
    • = 45g
  • 8. Solubility
    • Saturated Solution
    • - A solution where maximum amount of solute is dissolved in the solvent.
    A B
  • 9. Solubility
    • Factors affecting solubility:
    • Temperature
    • Nature of Solute
    • Nature of Solvent
  • 10. Solubility
    • The higher the temperature, the greater the solubility
    Temp/°C Solubility/ g per 100g of solvent 0 10 20 30 40 10 20
  • 11. Solubility
    • Conclusion
    • Solubility is the amount of solute that can be dissolved in 100g of solvent
    • Saturated Solution has maximum solute in the solvent.
    • Temperature, nature of solvent and solutes affect solubility