1 7 What Is Solubility
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  • 1. Launch: 1/7   Grab your binder and immediately take a seat!   Place launch paper and HW (practice questions) on your desk.   Yesterday’s Exit Slip Data: 89%   Today’s Objective: I can describe the factors that affect the dissolving process.
  • 2. Launch: 1/7   Grab your binder and immediately take a seat!   Place launch paper and HW (practice questions) on your desk.   Yesterday’s Exit Slip Data: 77%   Today’s Objective: I can describe the factors that affect the dissolving process.
  • 3. Launch: 1/7   Grab your binder and immediately take a seat!   Place launch paper and HW (practice questions) on your desk.   Yesterday’s Exit Slip Data: 86%   Today’s Objective: I can describe the factors that affect the dissolving process.
  • 4. Launch: 1/7   Grab your binder and immediately take a seat!   Place launch paper and HW (practice questions) on your desk.   Yesterday’s Exit Slip Data: 93%   Today’s Objective: I can describe the factors that affect the dissolving process.
  • 5. Launch 1/7 1.  In 1-2 sentences, explain what we demonstrated on the basketball court yesterday. What letter did the solvents put up? What did the solvents do to the solutes?
  • 6. Launch 1/7 1.  In a solution, a.  the solvent particles are attacked by the solute. b.  the solvents are dissolved by the solutes. c.  the two substances are not evenly mixed throughout. d.  the solutes are dissolved by the solvents.
  • 7. Launch 1/7 5.  If the attractive forces among solid particles are less than the attractive forces between the solid and the liquid, the solid will a.  probably form a new precipitate as its crystal lattice is broken and reformed. b.  be unaffected because the attractive forces within the crystal lattice are too strong for dissolution to occur. c.  begin the process of melting to form a liquid. d.  dissolve as particles are pulled away from the crystal lattice by the water molecules
  • 8. New Changes for the New Year!   Late homework policy   Late homework in now due the day after you return   Notes packets, handouts, and practice questions will can be found:   at the back of the classroom
  • 9. New Changes for the New Year!   Class consequences 1.  Name on board 2.  Take a break 3.  Call home 4.  Sent to Mr. Wandera   Rules: still the same 7
  • 10. January Calendar
  • 11. What is solubility? Mr. Heffner 1/7/10
  • 12. Review: How are solutes dissolved?   In a solution… 1.  The solute (solid) is attacked by the solvent (liquid) 2.  Solid-solid attractions are overpowered by the liquid 3.  The solute is surrounded = dissolved
  • 13. What is solubility?   Solubility is…   how well a solute dissolves in a given amount of solvent. Instructions:   1 packet Kool-aid   60oz of water   What would happen if you added 2 packets?   The extra powder wouldn’t dissolve because…   the Kool-aid reaches it’s maximum solubility in water   the solution is saturated
  • 14. What is solubility?   Two factors that affect the solubility of solid solutes… 1.  Temperature   temperature = solubility   More Kool-aid dissolves, faster   temperature = solubility   Less Kool-aid dissolves, slower   recrystallizes   Why?   Higher temp = faster H2O molecules = attack more
  • 15. What is solubility?   Two factors that affect the solubility of solid solutes… 2.  Surface area   surface area = solubility more SA   Granulated sugar dissolves faster   surface area = solubility   Sugar cubes dissolve the slower less SA   Why?   Larger surface area = more places to attack
  • 16. What is solubility?   Two factors that affect the solubility of gas solutes… 1.  Temperature – opposite of solid!   temperature = solubility of gas   temperature = solubility of gas   Why?   Higher temp = more speed = gas molecules escape!
  • 17. What is solubility?   Two factors that affect the solubility of gas solutes… 2.  Pressure (gases only)   pressure = solubility   pressure = solubility   Why?   The gas molecules are pushed into the solvent
  • 18. Practice Questions   Practice question worksheet
  • 19. Exit Slip 1.  Solubility is a.  the solvent particles are attacked by the solute. b.  how well a solute dissolves in a given amount of solvent. c.  the two substances are not evenly mixed throughout. d.  how well a solvent dissolves in a given amount of solute.
  • 20. Exit Slip 2.  Liquids at higher temperatures a.  have more solubility than liquids at lower temperatures b.  have the same amount of solubility as liquids at lower temperatures c.  have less solubility than liquids at lower temperatures d.  dissolve solutes slower than liquids at lower temperatures.
  • 21. Exit Slip 3.  5 grams of sugar would dissolve the fastest in a.  cold water. b.  warm water. c.  hot water. d.  none of the above.
  • 22. Exit Slip 4.  Which of the following would dissolve the fastest in water? a.  powdered sugar (most surface area) b.  granulated sugar (moderate amount of surface area) c.  broken sugar cubes (moderate amount of surface area) d.  sugar cubes (least amount of surface area)
  • 23. Exit Slip 5.  There to be more gas dissolved in a.  a cold Diet Coke than a warm Diet Coke b.  a warm Diet Coke than a cold Diet Coke c.  a warm salt water solution than a cold salt water solution d.  a lower pressure bottle of Diet Coke than a high pressure bottle of Diet Coke.
  • 24. Homework   Finish practice questions