STAPLE

1. 4/1/2013 Standards: 9 (Equilibria) Objectives: ●  Work CST problems with responders to start CST Review (q's 29-34) ●  Ch 18.2 Students will be able to use the LeChatelier principle to determine equilibrium "shifts". is given. DO NOW: 1. GET RESPONDERS 2. Work ALL probs from Equilibrium (Zum handout use answer format) on handout given to you last week. (5 pts) DUE END OF PERIOD HOMEWORK: 1. Ch 18.2 p. 574 13-15 (5 problems) (5 pts) Std 9 2. CST Problems 29-34 (5 pts) Std 9 Follow these directions - Copy questions if no calculations and give reasons with page #'s or quote me if I gave explanation; for calculation problems - given, find, and show calcs. =========================================================== STAMPING:   ●  Journal 3/29 1. Ch 18.2 p. 574 10-12 (7 problems) STAPLE Ans Format (5 pts) Std 9 2. CST Problems 23-28 (5 pts) Std 9 Follow these directions - Copy questions if no calculations and give reasons with page #'s or quote me if I gave explanation, for calculation problems - given, find, and show calcs. STAPLE

2. We need to set something straight: This of these kJ as heat being lost or gained from the system (equilibrium mixture) If system loses (-) kJ - you feel temp rise if system gains (+) kJ - you feel the temp go down

3. Lechat - Compare Concentration (aq, g) How LeChat shifts work: Shift to same side as stress species -----> increase species' conc. Shift to oppositeside as stress species ----> decreases species' conc. Size of vessel and Press. How LeChat shift works: Shift to side withmore moles ----> more pressure Shift to side withfewer moles -----> less pressure Pressure (g) How LeChat shift works: Shift to sameside as heat ----> increases the temp. Shift tooppositeside from heat -----> reduces the temp. Temp (g)

5. Equilibria - practice problems Std 9 Zumdahl p. 542-543 heat + ENDO + heat heat + ENDO + heat heat + EXO ENDO heat + EXO = heat right ENDO - heat left ENDO + heat EXO

6. opp. side as heat same side as heat From the above, we find the answers a. If we want LeChat's help, more CH3CHO is RIGHT lower temp is RIGHT b. less C2H2 is RIGHT lower temp is RIGHT c. more H2O is LEFT higer temp is LEFT

7. heat + heat + + heat heat + heat + Exo if + kJ Endo if - kJ + heat

8. 4/2/2013 Standards: 9 (Equilibria) Objectives: ●  Work CST problems with responders to start CST Review (q's 35-40) ●  Students will be able to work Equilibrium shift problems. DO NOW: 1. GET RESPONDERS 2. p. 591 59 (a,b,c, and d) on LeChat Prob - fomat for ans document HOMEWORK: 1. Ch 18 Assess - p. 591 59-64 all (use LeChat Prob - format for ans) 2. CST Problems 35-40 (5 pts) Std 9 Follow these directions - Copy questions if no calculations and give reasons with page #'s or quote me if I gave explanation; for calculation problems - given, find, and show calcs. =========================================================== STAMPING:   ●  Journal 4/1 1. Ch 18.2 p. 574 13-15 (5 problems) (5 pts) Std 9 2. CST Problems 29-34 (5 pts) Std 9 STAPLE

9. Video done for today 4/2/13 If you like my sheet on LeChatelier Problems - format for answers here is the link for getting this sheet: http://mrwiggersci.com/chem/Tutorials/LeChat-probs-ans-format.htm As you read LeChat problems sometimes they use heat by writing something like this: ΔH = - 50kJ I'll be showing you: 1. what ΔH = - 50kJ means in terms of where "heat" goes in equations 2. page to show how LeChatelier will change equilibrium positions 3. the DO NOW for 4/2 - p. 591 #59 4. HW problem p. 574 #13 a,b, and c

10. We need to set something straight: Think of kJ as heat being lost or gained from the system (equilibrium mixture) If system loses (-) kJ - you feel temp rise if system gains (+) kJ - you feel the temp go down

11. Lechat - Compare Concentration (aq, g) How LeChat shifts work: Shift to same side as stress species -----> increase species' conc. Shift to oppositeside as stress species ----> decreases species' conc. Size of vessel and Press. How LeChat shift works: Shift to side withmore moles ----> more pressure Shift to side withfewer moles -----> less pressure Pressure (g) How LeChat shift works: Shift to sameside as heat ----> increases the temp. Shift tooppositeside from heat -----> reduces the temp. Temp (g)

12. 1 Which way will the equilibrium mix shift? A left B right a 591 b c d How to do this lesson Use as DO NOW - then responder quiz to check for understanding After each answer, call on one student to come up and fill in chart for that question

13. First see what LeChat does opp. side as heat same side as heat From the above, we find the answers a. If we want LeChat's help, more CH3CHO is RIGHT lower temp is RIGHT b. less C2H2 is RIGHT lower temp is RIGHT c. more H2O is LEFT higer temp is LEFT

15. 4/3/2013 Standards: 9 (Equilibria) Objectives: ●  Work CST problems with responders to start CST Review (q's 41-46) ●  Students will be able to work Equilibrium shift problems. DO NOW: 1. GET RESPONDERS 2. Standardized Test Practice p. 593 1 & 2 (give explanations and page #'s for each question) HOMEWORK: 1. Ch 18.3 p. 576 #16 (a,b, & c) and p. 591-592 #65 & 66 (5 pts) Std 9 2. CST Problems 41-46 (5 pts) Std MISC Follow these directions - Copy questions if no calculations and give reasons with page #'s or quote me if I gave explanation; for calculation problems - given, find, and show calcs. =========================================================== STAMPING:   ●  Journal 4/2 1. Ch 18 Assess - p. 591 59-64 all (use LeChat Prob - format for ans) 2. CST Problems 35-40 (5 pts) MISC STAPLE

18. See Monday's HW page in the lesson plan area Equilibrium Sliders http://www.chm.davidson.edu/java/LeChatelier/LeChatelier.html Equilibrium Animations http://www.kentchemistry.com/links/Kinetics/LeChatelier.htm

19. New type of questions using Keq aA + bB = cC + dD [C]c[D]d Keq = [A]a[B]b

20. 2 Which of the following values can change in the Keq expression? A aA B bB C cC D dD E Keq

21. p. 575 Keq = 3.933 M In these types of problems you will be given all but one of the reactant & product concentrations and Keq value.

22. [C]c[D]d Keq = [A]a[B]b

23. Thursday 4/4/13

24. Friday 4/6/13