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Catalyst

Catalyst. Please complete on WEEK SHEET for Thursday, March 29 th , 2012. Remember: Show your strategies ! Underline the question Circle key words [Bracket] anything you don’t understand Eliminate answers Choose correct answer 3 minutes left!. Catalyst.

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Catalyst

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  1. Catalyst Please complete on WEEK SHEET for Thursday, March 29th, 2012. Remember: Show your strategies! • Underline the question • Circle key words • [Bracket] anything you don’t understand • Eliminate answers • Choose correct answer 3 minutes left!

  2. Catalyst Please complete on WEEK SHEET for Thursday, March 29th, 2012. Remember: Show your strategies! • Underline the question • Circle key words • [Bracket] anything you don’t understand • Eliminate answers • Choose correct answer 2 minutes left!

  3. Catalyst Please complete on WEEK SHEET for Thursday, March 29th, 2012. Remember: Show your strategies! • Underline the question • Circle key words • [Bracket] anything you don’t understand • Eliminate answers • Choose correct answer 1 minute left!

  4. Catalyst Please complete on WEEK SHEET for Thursday, March 29th, 2012. Remember: Show your strategies! • Underline the question • Circle key words • [Bracket] anything you don’t understand • Eliminate answers • Choose correct answer Catalyst Checkers!!!

  5. Agenda • Notebook Quiz • Finish Quiz • Grade Quiz • 2 demos • Whiteboard Review

  6. Notebook Quiz • Get ready… • 3 questions • Write answer on mini sheet • If you’re looking around, you earn a zero • When finished, we immediately pass it on towards the middle • I’ll give you 10 seconds

  7. Question #1 On the solubility Rules WS on page 96, we classified the first compound, potassium bromide as what? Soluble or insoluble?

  8. Question #2 Looking at your table of contents, what is the title of what we did on page 94?

  9. Question #3 On the top of the sheet on page 95, list two compounds that are in the graph. (formula is fine)

  10. Times up! You have 10 seconds to pass it to the middle!

  11. Times up! I’ll grade the ones that were handed in on time

  12. Return Quizzes • Quizzes and answer keys are online • Along with powerpoints (including today’s WHICH IS A GREAT REVIEW) • Quizzes and today’s powerpoint make for a great review

  13. Increase / Decrease Solubility? • If you use large particles or chunks of cinnamon ?

  14. Increase / Decrease Solubility? • If you use large particles or chunks of cinnamon ? • Decrease – small particles increase solubility b/c of more surface area

  15. Increase / Decrease Solubility? • If you stir the mixture with a stirring rod?

  16. Increase / Decrease Solubility? • If you stir the mixture with a stirring rod? • Increase because more solvent particles are coming in contact with solute particles causing more SOLVATION

  17. Increase / Decrease Solubility (rate of dissolving)? • If you increase the temperature of a mixture?

  18. Increase / Decrease Solubility (rate of dissolving)? • If you increase the temperature of a mixture? • Increase the rate of dissolving due to more collisions between solvent molecules surrounding solute particles (SOLVATION)

  19. Increase / Decrease Solubility (rate of dissolving)? If manufacturers of Coke dissolved CO2 gas in a very hot, 90 degree room?

  20. Increase / Decrease Solubility (rate of dissolving)? If manufacturers of Coke dissolved CO2 gas in a very hot, 90 degree room? Decrease solubility because higher temperatures make gases ‘jump out’ of solutions Temperature is inversely related with gas solubility (if temp increases, solubility decreases but if temp decreases, solubility increases)

  21. Increase / Decrease Solubility (rate of dissolving)? If manufacturers of Coke dissolved CO2 gas in a very high pressurized can?

  22. Increase / Decrease Solubility (rate of dissolving)? If manufacturers of Coke dissolved CO2 gas in a very high pressurized can? Increase rate of dissolving because high pressure keeps the gas from ‘jumping out’. Pressure and solubility of gas are directly related (if pressure increases, then solubility of gas increases and if pressure decreases, solubility of gas decreases)

  23. You have a kool-aid solution that is very dilute and you could add more sugar, the kool-aid is an example of a(n) _?_ solution.

  24. You have a kool-aid solution that is very dilute and you could add more sugar, the kool-aid is an example of a(n) _?_ solution. Unsaturated (not enough, put more in)

  25. POLAR / NON-POLAR? • Water is polar and oil is non-polar. The food coloring dissolves in water, therefore food coloring is ?

  26. POLAR / NON-POLAR? • Water is polar and oil is non-polar. The food coloring dissolves in water, therefore food coloring is • POLAR because we know ‘LIKE DISSOLVES LIKE’ • Polar dissolves polar • Non-polar dissolves non-polar

  27. Soluble / Insoluble? Lead (II) chloride

  28. Soluble / Insoluble? Lead (II) chloride Insoluble Cl- is soluble EXCEPT with Ag, Pb, and Hg LEAD is Pb therefore Insoluble

  29. Precipitate or no precipitate? Iron (III) sulfate

  30. Precipitate or no precipitate? Iron (III) sulfate no precipitate b/c SO42- is soluble except with Sr, Ba, Pb, and Hg Iron is Fe so none of the exceptions

  31. Precipitate or no precipitate? Pb(NO3)2 reacts with NaBr Remember they switch partners

  32. Precipitate or no precipitate? Pb(NO3)2 reacts with NaBr Remember they switch partners PbBr2 + NaNO3 PbBr2is insoluble so PRECIPITATE

  33. 3 things you can tell me about this picture

  34. NaCl is being dissolved by water (aq) • Opposites attract (Cl- is attracted to H’s and Na+ is attracted to O-) • This process is called SOLVATION

  35. At 30oC, how much KClO3 can be dissolved in 100 g H2O?

  36. At 30oC, how much KClO3 can be dissolved in 100 g H2O? 11 g or 12 g (just above 10 g line)

  37. V1M1= V2M2 • You need a 0.70 M BaOHsolution. What volume would you end up with if you diluted 0.20 L of 0.90 M NaOH solution to obtain the necessary 0.70 M BaOHsolution?

  38. V1M1= V2M2 • You need a 0.70 M BaOHsolution. What volume would you end up with if you diluted 0.20 L of 0.90 M NaOH solution to obtain the necessary 0.70 M BaOHsolution? • = (0.20 L)(0.90 M) / 0.70 M • = 0.18/ 0.70 = 0.25714 = 0.26 L V2 M1 V1 M2

  39. Colligative Properties • Mr. Kersten is attempting to freeze his ice at the coldest temperature possible. Which amount of salt would cause the greatest freezing point depression? • 100 mol NaCl • 200 mol LiCl • 300 mol KBr • 400 mol NaBr

  40. Colligative Properties • Mr. Kersten is attempting to freeze his ice at the coldest temperature possible. Which amount of salt would cause the greatest freezing point depression? • 100 mol NaCl • 200 mol LiCl • 300 mol KBr • 400 mol NaBr b/c it DEPENDS ON CONCENTRATION = the more solute you have, the greater the depression of the freezing point (NaClvsKBrvsNaBr does NOT matter)

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