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2/25/2013 Standard : 4 (Gases and their Properties) O BJECTIVES :

2/25/2013 Standard : 4 (Gases and their Properties) O BJECTIVES :   ● Complete " Discovering direct & inverse in PV = nRT - Mini-Lab"  ● Students will understand the specific units of measure in PV = nRT D O NOW : 1. Read lab (today's handout) silently to yourself. H OMEWORK :

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2/25/2013 Standard : 4 (Gases and their Properties) O BJECTIVES :

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  1. 2/25/2013 Standard: 4 (Gases and their Properties) OBJECTIVES:   ● Complete "Discovering direct & inverse in PV = nRT - Mini-Lab"  ● Students will understand the specific units of measure in PV = nRT DO NOW: 1. Read lab (today's handout) silently to yourself. HOMEWORK: 1. Ch 14.3 PP's p. 437 41-45 (5 pts) Std 4 =========================================================== BASKET (Stamped): Journal 2/22 (Dalton's Law Lab) 1. SN Ch 14.2 p. 190, Ch 14.3 p. 193-195 (3 pts) Std 4 2. Appendix A p. 879 8 & 9 (2 pts) Std 4

  2. http://mrwiggersci.com/chem/Labs/Lab-Gas-Sim-PVnT-relations-direct-or-inverse.pdfhttp://mrwiggersci.com/chem/Labs/Lab-Gas-Sim-PVnT-relations-direct-or-inverse.pdf Discovering direct vs inverse in PV = nRT - Mini-Lab

  3. PV = nRT ----- Ideal Gas Law Always use the following units when calculating anything with PV = nRT see p. 435 for units used for R, which require you use different units from what you see above P - atm V - L n - mol (never g) R = 0.0821 (don't bother w unit) T - always K PV nT

  4. 2/26/2013 Standards: 4 (Gases and their Properties) OBJECTIVES:   ● Students will be able to predict how ideal (accurate) an Ideal Gas Law calculation will be based on the conditions.   ● Students will be able to use STP in gas law calculations DO NOW: 1. p. 437 41-45 HOMEWORK: 1. Ch 14.2 PP's p. 432-433 24 - 33 (5 pts) Std 4 =========================================================== BASKET (turned in): Journal 2/25 1. Ch 14.3 PP's p. 437 41-45 (5 pts) Std 4

  5. Students having problems solving for an unknown, this is helpful. Have students solve for unknows in abcde letters, then use PV=nRT to apply it.

  6. IDEAL GAS LAW PV = nRT Do intro to this by showing tennis ball and golf balls, tell them they won't believe you but they actually attract each other. Molecules do the same thing, both by gravity and if they are polar, by magnetism. Show magnets, fast motion and slow motion to demo temp high makes faster motion and pressure low allows more separation reducing attractive forces between molecules of gas. Not 100% accurate? Why? Intermolecular forces exist!!!!!! What conditions make it most accurate? high temperature low pressure

  7. STP Temp - 0°C = 273K Pressure - 1 atm

  8. Magic of STP 22.4 L of any gas = 1 mol @ STP

  9. Guided Practice a. 3.00 mol O2 at STP has what volume? b. 8.00 L Ar at STP has how many moles?

  10. Extra Credit/ sentences p. 432 PP's 24 - 28 Show givens, find, and gas law you will use to solve. Work in groups of 4. Ex Cr for each group called on if the person called from the group can give and understand the problem called on.

  11. 2/27/2013 Standards: 4 (Gases and their Properties) OBJECTIVES:   ● Demo Charles' Law (plastic bottles & simulator), and Boyle's Law (sim. only) as review DO NOW: 1. Review last night's HW & be sure you got it right! HOMEWORK: 1. Ch 14.4 PP's p. 441 56-59; p. 443 60 (5 pts) Std 4 =========================================================== BASKET (turned in): Journal 2/26 1. Ch 14.2 PP's p. 432-433 24 - 33 (5 pts) Std 4

  12. To Journalize is to Realize what you actually learned

  13. ANNOUNCEMENT If you have missed any of the labs for Ch 14 (see website) because you were absent or just didn't turn them in, you are still responsible to make these up. There are three counting the Boyle's Law lab you will be turn in next Monday. All labs must be made-up by Friday of next week

  14. Boyle's Law Lab & simulator http://mrwiggersci.com/chem/Labs/lab_Boyle_Law-use-gas-sim.htm DEMONSTRATION OF SIM FIRST - then: Go to computers and see if you can make the simulator work. This will be due on Monday 3/4/13. Go to Learning Center > Labs > Ch 14 > Boyle's Law Lab Try 2 different volumes and see what the pressures are. This lab will be due on Monday 3/4/13

  15. Charles Law - demonstration and simulator - demo sim and bottles in & out of hot water http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/gaslaw/charles_law.html

  16. Balanced chemical equations give you 2 ratios! 1. mol (as before) 2. volume Volume and mole relationship is DIRECT because: 1 mol of any gas is will occupy 22.4 L of volume at STP

  17. This also means: as long as the gases you are comparing are under the SAME conditions, this relationship exists.

  18. So, this applies to all problems on p. 441 and p. 443

  19. 2/28/2013 Standards: 4 (Gases and their Properties) OBJECTIVES:   ● Students will be able to solve stochiometry problems of volume - mass   ● Students will be able to do concept maps for g A ---> L B DO NOW: 1. Balance this equation. __KClO3 ----> __O2 + __KCl 2. Draw a concept map to figure out how many liters of O2 can be created form 29g KClO3 at STP. 3. Show given, find, and then solve the problem. HOMEWORK: 1. Ch 14.4 PP's p. 443 61 - 64 and Assess 65 - 67 (5 pts) Std 4 =========================================================== BASKET (turned in): Journal 2/27 1. Ch 14.4 PP's p. 441 56-59; p. 443 60 (5 pts) Std 4

  20. Be ready to summarize and / or tell what you just learned in a different way (in your own words)

  21. This series of 4 pics is the natural result of water dripping through CaCO3 to form limestone in caves described in problem 61

  22. Stalagmites from water dripping down through CaCO3 to form limestone CaO Stalactites also CaO

  23. Stalactite cave in Israel

  24. Wonder Caves Stalagmites

  25. Very large stalagtites meet their opposing stalagmites

  26. 3/1/2013 Standards: 4 (Gases and their Properties) OBJECTIVES:   ● Start preparation for Quiz 3.3 (Ch 13.1 & 14) DO NOW: 1. Start HW, ask questions if you don't understand. HOMEWORK: 1. Ch 14 Assess p. 448-449 88 (1. 1.6 atm; 2. 190 K; c. 510 mmHg; d. 0.96 atm), 90 (1.17 atm), 92 (74.8 kPa), 94 (5.91 x 104 L), 96 (34 L), 98 (2.93 g/L) (5 pts) Std 4 2. Std Test Pract p. 451 1-5 (5 pts) Std 4 ======================================================= BASKET (stamped): Journal 2/28 1. Ch 14.4 PP's p. 443 61 - 64 and Assess 65 - 67 (5 pts) Std 4 Announcements: 1. Ch 14 Quiz 3.3 scheduled for Tu 3/5 (60 pts) 2. Mem Ions 4 (4th time) Fri 3/8 (40 pts) 3. Boyle's Law Lab due Mon 3/4 (15 pts)

  27. Boyle's Law Lab - link for instructions on how to perform the lab. http://www.youtube.com/watch?v=r14CiDqWzLQ

  28. p. 448 #90 1 L 2 L

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