4/2/2012 Standards: 6 (Solutions) Objectives: ● Mr. Wigger Absent - problems to practice material from Ch 15.1 & 15.2 D O NOW: 1. Ch 15 Assess, p 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 (1 pt) 2. Ch 15.2 Assess, p , 30, 32 (1 pt) 3. Ch 15 Assess, p (3 pts)

4/3/2012 Standards: 6 (Solutions) Objectives: ● CST Released Questions responder quiz ● Understand how to make & dilute molar solns using M 1 V 1 = M 2 V 2 ● 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 & 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 (1 pt) 2. Ch 15.2 Assess, p , 30, 32 (1 pt) 3. Ch 15 Assess, p (3 pts) RESPONDERS TODAY

com/chem/Labs/la b_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 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 = 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 mol 1 x g NaCl 1 mol NaCl =58.44 g NaCl So, we weigh out g NaCl by pouring it into the emply flask Homework on making molar solutions using this animation com/physsci/che mistry/animations /chang_7e_esp/cr m3s1_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 mL of a M solutions of K 2 Cr 2 O 7 solution. 3rd Animation Make mL of a M solution of KMnO 4 solution. Animation also available on my website at: "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 ΔT b (change boiling pt temp), ΔT f (change freezing pt temp) ● Mem Ions pts DO NOW: p. 475 # 36 HOMEWORK: 1. Ch 15.3, Pract Probs, p (2 pts) Std 6 2. Ch 15.3 p (3 pts) Std 6 ========================================================== STAMPS (Basket first): ● Journal 4/3 1. p & 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

ΔT f (change freezing pt) ↓ ΔT b (change boiling pt) ↑ ELEVATION DEPRESSION

ΔT b (change boiling pt) ↑ Δ ↑ ELEVATION ↑↑

ΔT f (change freezing pt) ↓ Δ ↓ DEPRESSION ↓ ↓

4/5/2012 Standards: 6 (Solutions) Objectives: ● CST released questions ● 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 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 (2 pts) Std 6 2. Ch 15.3 p (3 pts) Std 6 RESPONDERS TODAY

Answers to Assessment problems from last night's HW

1000 nm COLLOIDS SUSPENSIONS BIGGER THAN SMALLER THAN

Demonstrate Tyndall effect using CoCl 2 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? ΔT f (change freezing pt) see chart p mol glucose in 1.5 L water 2.2 mol AlCl 3 in 1.5 L water

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 – 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 M 1 V 1 = M 2 V 2 DO NOW: 1. problems from tonight's HW p466 #19, 22, p. 485 # take notes on Making Molar Solns - Animation HOMEWORK: 1. CST Released Questions (5 pts) Std: Many 2. Ch 15.2 PP's, p (1 pts) Std 6 3. Ch 15.2 Assess, p , 30, 32 (1 pts) Std 6 4. Ch 15 Assess, p (3 pts) Std 6 =================================================================== STAMPS: ● Journal - NONE BASKET: NONE `