Solubility curves

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Solubility curves

  1. 1. 1. Loose, granular sugar dissolves much faster than a sugar cube because the loose, granular sugar . A. has a greater surface area B. has less kinetic energy C. has a higher temperature D. has greater surface tension 2. You can make a solute dissolve more quickly in a solvent by . A. adding more solute B. adding ice C. heating the solvent D. removing some of the solvent 3. Water is referred to as the “universal solvent” because . A. it is in the liquid state through a wide range of temperatures B. all known substances will dissolve in water C. many different substances will dissolve in water D. it covers two-thirds of the Earth’s surface
  2. 2. Review • Universal solvent • Likes dissolve likes • Speeding up dissolving rates
  3. 3. Speeding up the dissolving process 1. Shaking or stirring the solution 2. Increase the surface area of the solute 3. Raising the temperature of the solvent
  4. 4. The Affect of Changing the Solvent Temperature on the Dissolving Rate 120 Time (sec.) 100 80 60 40 20 0 0 20 40 60 Temperature (C) 80 100
  5. 5. Solubility and Concentration • Concentration- the quantity (how much) of a solute is in a solution • Concentrated- a lot of solute dissolved • Dilute- a small amount of solute dissolved
  6. 6. Solubility and Concentration • Saturated- can not hold any more solute • Unsaturated- can hold some more solute
  7. 7. Solubility and Concentration •Supersaturated •Holds more solute than it normally can
  8. 8. Solubility Curves • Increasing the temperature increases the dissolving rate • It also increases the amount of solute a solvent can hold We know this from the previous lab!
  9. 9. Solubility Curves •In general: higher temperatures means water will hold more solid solutes
  10. 10. Solubility Curves •In general: higher temperatures means water will hold less gaseous solutes

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