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4/2/2012 Standards : 6 (Solutions) O bjectives :

4/2/2012 Standards : 6 (Solutions) O bjectives : ● Mr. Wigger Absent - problems to practice material from Ch 15.1 & 15.2 D O NOW : 1. Ch 15 Assess, p. 484-485 64 thru 67, 76 (a thru c), 77 (a thru c) H OMEWORK :

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4/2/2012 Standards : 6 (Solutions) O bjectives :

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  1. 4/2/2012 Standards: 6 (Solutions) Objectives: ●Mr. Wigger Absent - problems to practice material from Ch 15.1 & 15.2 DO NOW: 1. Ch 15 Assess, p. 484-485 64 thru 67, 76 (a thru c), 77 (a thru c) HOMEWORK: 1. Be sure you have calculated the mass % and M for your lab group and all other lab groups. 2. Get prepared for Mem. Ions 4 re-test - will happen either Tu or Wed. Quiz you took last week will only be 5 points, and the retest will count as 45 points. ========================================================= BASKET: 1. Ch 15.2 PP's, p. 468 21-23 (1 pt) 2. Ch 15.2 Assess, p. 470 28, 30, 32 (1 pt) 3. Ch 15 Assess, p. 485 78-82 (3 pts)

  2. RESPONDERS TODAY 4/3/2012 Standards: 6 (Solutions) Objectives: ● CST Released Questions 26-30 - responder quiz ● Understand how to make & dilute molar solns using M1V1 = M2V2 ● Understand how to complete your lab - Mass% & M   ● molality and colligative properties DO NOW: 1. problems p469 #24 HOMEWORK: 1. Complete and turn in Mass% & Molarity (M) lab (20 pts) 2. p. 469 24 & 25 (2 pts) Std 6 3. take notes on Making Molar Solns - Animation (3 pts) ========================================================== STAMPS:  ●  Journal - NONE 1. Ch 15.2 PP's, p. 468 21-23 (1 pt) 2. Ch 15.2 Assess, p. 470 28, 30, 32 (1 pt) 3. Ch 15 Assess, p. 485 78-82 (3 pts)

  3. http://mrwiggersci.com/chem/Labs/lab_mass_percent_molarity-write-up-directions.htmhttp://mrwiggersci.com/chem/Labs/lab_mass_percent_molarity-write-up-directions.htm

  4. Homework on making molar solutions using this animation http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/crm3s1_2.swf First animation: Make 1.00 L of a 1.00 M solution of NaCL 1. Select the 1 L volumetric flask because you want exactly 1 L of solution 2. Click on the "tare button" to zero the balance w the flask on it. 3. We need one mole of NaCl. 1 mol NaCl = 58.44 g NaCl In order to make 1.00 L of solution we will need to figure like this: 4. Next we add enough water to fill 1/2 of the flask, and mix the solution until all NaCl dissolves. 5. Pour enough water to come up close to the line, and add the rest of the water with a dropper until the bottom of the meniscus is barely touching the line. 1.00 mol 1 58.44 g NaCl 1 mol NaCl x = 58.44 g NaCl So, we weigh out 58.44 g NaCl by pouring it into the emply flask

  5. For the other two animations, do exactly as you saw written on the prior page. Now you will need to make these 2 solutions using the animation: 2nd Animation Make 500.0 mL of a 0.0250 M solutions of K2Cr2O7 solution. 3rd Animation Make 100.0 mL of a 0.125 M solution of KMnO4 solution. Animation also available on my website at: www.mrwiggersci.com/chem "Learning Center" > "Web Helps" > Ch 15 > Concentration (first flash animation)

  6. 4/4/2012 Standards: 6 (Solutions) Objectives: ● Be able to understand how molality (m) afftects Colligative Properties such as ΔTb (change boiling pt temp), ΔTf(change freezing pt temp) ● Mem Ions 4 - 45 pts DO NOW: p. 475 # 36 HOMEWORK: 1. Ch 15.3, Pract Probs, p. 475 33-36 (2 pts) Std 6 2. Ch 15.3 p. 485 86-89 (3 pts) Std 6 ========================================================== STAMPS (Basket first): ●  Journal 4/3 1. p. 469 24 & 25 (2 pts) Std 6 2. take notes on Making Molar Solns - Animation (3 pts) STAPLE BLACK TRAY: 1. Turn in Mass% & Molarity (M) lab (20 pts) (DON'T FORGET YOUR LAB GROUP #

  7. Δ = change

  8. Δ COLLIGATIVE PROPERTIES

  9. ↑ ELEVATION ΔTb (change boiling pt) ↓ ΔTf (change freezing pt) DEPRESSION

  10. ↑ ↑ ↑ ELEVATION ΔTb (change boiling pt) ↑ Δ

  11. ↓ ΔTf (change freezing pt) ↓ ↓ ↓ DEPRESSION Δ

  12. RESPONDERS TODAY 4/5/2012 Standards: 6 (Solutions) Objectives: ● CST released questions 31-35 ● Students will be able to describe what causes Tyndall effects (p. 479) ● Student will be able to describe Suspensions & Colloids   DO NOW: 1. Define: suspension colloid "Tyndall effect" 2. List 2 problems you had trouble with from last night's HW (chk ans - nxt slide) HOMEWORK: 1. Calif. Stds Pract. p. 487 1-10. Directions - if calc problem, show given & find & calc, circle answer, show letter of correct ans; if non-calc problem copy entire question, give complete reason and page # in bk that show why your ans is correct, give letter of correct answer circling letter and ans. (5 pts) Std 6 ========================================================= STAMPS:   ●  Journal 4/4 1. Ch 15.3, Pract Probs, p. 475 33-36 (2 pts) Std 6 2. Ch 15.3 p. 485 86-89 (3 pts) Std 6

  13. Answers to Assessment problems from last night's HW

  14. BIGGER THAN SUSPENSIONS 1000 nm COLLOIDS SMALLER THAN

  15. Demonstrate Tyndall effect using CoCl2 using flashlight & 1000ml beaker. Demonstrate tap water with conductivity light.

  16. 1. What is the molality of each? 2. What is the melting/freezing point of each? ΔTf (change freezing pt) see chart p. 474 2.2 mol glucose in 1.5 L water 2.2 mol AlCl3 in 1.5 L water

  17. 4/6/2012 Standards: MISC Objectives: ●  Each student will be better prepared for the Chemistry CST in May DO NOW: 1. Complete questions 39 – 54 (a) Circle correct ans. (b) If calcs needed, show calculations (c) if no calcs needed give page# from book or very complete explanation. **** (d) NEW - If you use a page # for your explanation, you must tell why that page number explains the question it is being used for. HOMEWORK: 1. CST 55-62 – same directions as in the DO NOW. =================================================================== STAMPS: ●  Journal - none! BASKET:

  18. 4/3/2012 Standards: 6 Objectives: ● Understand how to prepare molar solutions & How to dilute molar solutions ● Be able to calculate mass required to make 1 L of a solution at any M   ● Be able to calculate dilutions using M1V1 = M2V2 DO NOW: 1. problems from tonight's HW p466 #19, 22, p. 485 #80. 2. take notes on Making Molar Solns - Animation HOMEWORK: 1. CST Released Questions 25-31 (5 pts) Std: Many 2. Ch 15.2 PP's, p. 468   21-23 (1 pts) Std 6 3. Ch 15.2 Assess, p. 470   28, 30, 32 (1 pts) Std 6 4. Ch 15 Assess, p. 485   78-82 (3 pts) Std 6 =================================================================== STAMPS: ●  Journal - NONE BASKET: NONE `

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