1. 1/21/2013 NO SCHOOL - MLK DAY

2. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO 4 to grams of KMnO 4 (check ans = 647.8 g). If correct, start homework. HOMEWORK: 1. Ch 11.3, p. 323 - 324 27-29, and 30 (a-e). Show all calculations. All problems require 2 fractions, including given/1. Check you work, answer will be on today's HW page. (5 pts) Std 3. ========================================================== BASKET: Journal 1/18 (Molar Mass Lab) 1. Ch 11.3 p. 321 20-24, and p. 322 25-26 (5 pts) Std 3

3. When done, turn over ans sheet and quiz

7. DO NOW Convert 4.100 mol KMnO 4 to grams of KMnO 4

9. 1/23/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mass mol particles (compounds) DO NOW: 1. Convert 85.0 g KMnO 4 to particles of KMnO 4. Requires 3 fractions including the given/1. HOMEWORK: 1. Ch 11.3, p. 326 31-35. Show all calculations and label each section of each problem. (5 pts) Std 3 ========================================================== BASKET: 1. Ch 11.3, p. 326 31-35. Show all calculations. All problems require 3 fractions, including given/1. (5 pts) Std 3

10. ANNOUNCEMENT L ook at your on-line grade and your Stamp Sheet and compare to my on-line stamp sheet. If you have anything missing, you have until Friday to make-up or receive a note home to parents.

12. DO NOW 1. Convert 85.0 g KMnO 4 to particles of KMnO 4

13. p. 326 #31 Particles in this problem are: Ag 1+ IN SOLUTION Ag Cr O O O O CrO 4 2- ION Ag 2 CrO 4 THE SOLID ZERO CHARGE look below Cr O O O O Demo - AgNO 3 mix with NaCl

14. p. 326 #31 first convert 25.8 g Ag 2 CrO 4 to particles (molecules Ag 2 CrO 4 ). You cannot answer a, b, and c until you have done this conversion. Solution: a. convert particles of Ag 2 CrO 4 to particles of Ag 1+ ions. b. convert particles of Ag 2 CrO 4 to particles of CrO 4 2- ions. c. Finding the grams of one Ag 2 CrO 4 molecule means the grams/formula unit of Ag 2 CrO 4. That is the molar mass of Ag 2 CrO 4 divided by the Avo number. ratio of Ag 2 CrO 4 : Ag 1+ ions is: 2 Ag 1+ : 1 Ag 2 CrO 4 Use this ratio to convert Ag 2 CrO 4 particles (answer to first part of solution) 25.8 g Ag 2 CrO 4 1 mol Ag 2 CrO 4 6.02 x 10 23 Ag 2 CrO 4 ----------------------- x ---------------------- x ----------------------------- 1 332 g Ag 2 CrO 4 1 mol Ag 2 CrO 4 = 0.468 x 10 23 = 4.68 x 10 22 Ag 2 CrO 4 ratio of Ag 2 CrO 4 : CrO 4 2- ions is: 1 CrO 4 2- : 1 Ag 2 CrO 4 Use this ratio to convert Ag 2 CrO 4 molecules (answer to first part of solution) to CrO 4 2- ions AgAg AgAg CrCr O O O O 332 g Ag 2 CrO 4 1 mol Ag 2 CrO 4 1 mol Ag 2 CrO 4 6.02 x 10 23 Ag 2 CrO 4 x 5.51 x 10 -22 g/formula unit Ag 2 CrO 4 = 4.68 x 10 22 Ag 2 CrO 4 2 Ag 1+ 1 1 Ag 2 CrO 4 x = 9.36 Ag 1+ ions 4.68 x 10 22 Ag 2 CrO 4 1 CrO 4 2- 1 1 Ag 2 CrO 4 x = 4.68 X 10 22 CrO 4 2- ions

15. 1/24/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to calculate: mass mol particles (compounds) DO NOW: 1. Complete Worksheet on mass mol particles HOMEWORK: 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3 ========================================================== BASKET (Turned In): 1. Ch 11.3, p. 326 31-35. Show all calculations and label each section of each problem. (5 pts) Std 3 ANNOUNCEMENTS P ractice quiz (10 pts) on Friday 1/25 and Periods 1 & 2 notebooks to be collected Friday 1/25.

16. Answers to tonight's HW so you can check your answers. Ch 11.3, App A, p. 876 15-24

17. Notebooks collected for Periods 1 & 2 Fri 1/25 Periods 3 Mon 1/28 Periods 5 & 6 Tu 1/29 1/25/2013 Standards: 3 (Stoichiometry) Objectives: ● Review: mass mol particles (compounds) ● Mini-Quiz Ch 11.1-11.3 (10 pts) DO NOW: 1. Turn in HW and take a blank piece of paper. HOMEWORK: 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3 (Yes, DO IT AGAIN) If you do not have a text book, you will find the problems on the next page of this Whiteboard file. ========================================================== BASKET (Turned In): Journal 1/23 (2 days ago) 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3 Students were ill prepared for this quiz.

18. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3

21. FI ND GIV EN 2 students - one move arrows, one dictates set-up Given Find

25. Formula of a Hydrate moles of H 2 O moles of dry salt

26. HYDRATES Chemicals that adsorb water. Dried out hydrates will get "wet" if left out in an unsealed container. They will even get "wet" in a "closed" container if left long enough.

27. Example of hydrate Calculations BaCl 2 2 H 2 O Getting the moles of H 2 O Mass of evaporating dish = 15.9 g Mass of dish and hydrated salt = 400.0 Mass of hydrated salt 400.0 g Mass of dry salt 368