4/2/2012 Standards: 6 (Solutions) Objectives:●   Mr. Wigger Absent - problems to practice material from Ch 15.1 & 15.2DO 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)

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 propertiesDO 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)

RESPONDERS TODAY

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

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 solution2. 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 x 58.44 g NaCl

1 mol NaCl = 58.44 g NaCl

So, we weigh out 58.44 g NaCl by pouring it into the emply flask

Homework on making molar solutions using this animation http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/crm3s1_2.swf

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 AnimationMake 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)

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 ptsDO NOW: p. 475 # 36HOMEWORK: 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 #

Δ = change

COLLIGATIVE

PROPERTIES

Δ

ΔTf (change freezing pt)

↓

ΔTb (change boiling pt)

↑ELEVATION

DEPRESSION

ΔTb (change boiling pt)

↑

Δ

↑

ELEVATION↑ ↑

ΔTf (change freezing pt)

↓

Δ

↓DEPRESSION

↓ ↓

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

RESPONDERS TODAY

Answers to Assessment problems from last night's HW

1000 nm

COLLOIDS

SUSPENSIONS

BIGGER THAN

SMALLERTHAN

Demonstrate Tyndall effect using CoCl2 using flashlight & 1000ml beaker.

Demonstrate tap water with conductivity light.

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

4/6/2012 Standards: MISC Objectives:  ●  Each student will be better prepared for the Chemistry CST in MayDO 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:

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: Many2. Ch 15.2 PP's, p. 468   21-23 (1 pts) Std 63. Ch 15.2 Assess, p. 470   28, 30, 32 (1 pts) Std 64. Ch 15 Assess, p. 485   78-82 (3 pts) Std 6===================================================================STAMPS:  ●  Journal - NONE

BASKET: NONE

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