Notebooks collected for: Periods 3 Tu 1/29 Periods 5 & 6 Wed 1/30 1/28/2013 Standards: 3 (Stoichiometry) Objectives: ● Prep for and give instruction on Formula of a Hydrate ( RATIO ! ! ! ) DO NOW: 1. What is the ratio of each of the following ( dry salt : water ) a. BaCl 2 ● 2H 2 O ; b. CuSO 4 ● 5H 2 O ; c. MnSO 4 ● 1H 2 O ; d. Na 2 CO 3 ● 10H 2 O 2. Fill in the blank for problem p , Table 11-3 HOMEWORK: 1. Ch 11.5, p , Ch 11 Assess., p , 154, (5 pts) Std 3 Answers: 153 = CaSO 4 ● 2H 2 O ; 154 = BaCl 2 ● 2H 2 O 2. PRINT - Lab Sheet for Formula of a Hydrate (1 pt) Std 3 3. Complete calculations on bottom of the handout used in class. (1 pt) Std ========================================================== 3 BASKET (Stamp): Journal 1/23 (Wed last wk - converting g mol particles, such as how many fractions & why +) 1. App A, p , Ch (5 pts) Std 3

Wigger Video on how to figure formula of a hydrate, p. 349 # 152

HYDRATES Salt molecule Water molecule RATIO 1Given _____ (mol/g) BaCl 2 and ______ (mol/g) H 2 O, how many H 2 O molecules for each BaCl 2 ? 2.5 : 7.5 BaCl g/mol H 2 O = 18 g/mol anhydrous hydrated

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. (show bottle of guey salt)

Formula of a Hydrate moles of H 2 O moles of dry salt Ratio used Na 2 CO 3 ● 10H 2 O

evaporating dish mass of empty dish = g mass of dish with hydrate ("wet salt") = 16.4 g mass of dish + dry salt =

Mole Calculations

Notebooks collected for: Periods 3 Tu 1/29 Periods 5 & 6 Wed 1/30 1/29/2013 Standards: 3 (Stoichiometry) Objectives: ● Complete the lab and calculations for Formula of a Hydrate Lab ( RATIO ) DO NOW: 1. Read the lab SILENTLY to yourselves. HOMEWORK: 1. Practice Quiz copy questions (just given & find), show calculations on calculation problems. On problems that are not calculations, show page # and give complete explanation of why. ========================================================== BASKET (Turned-in): 1. Ch 11.5, p , Ch 11 Assess., p , 154, (4 pts) Std 3 Answers: 153 = CaSO 4 ● 2H 2 O ; 154 = BaCl 2 ● 2H 2 O 2. Complete calculations on bottom of the handout used in class. (1 pt) Std 3 STAMP AT YOUR DESK: Lab Sheet - Formula of a Hydrate (1 pt toward your lab grade) Std 3

Quiz 3.1 Coming Thursday 1/31

Cool for 5 min before taking mass. Qualification for getting lit up Mass for #1 & #2 & #3 & goggles on Heat for 10 min after glowing

Notebooks collected for: Periods 5 & 6 Wed 1/30 1/30/2013 Standards: 3 (Stoichiometry) Objectives: ● Review g mol particles (molecules or atoms) DO NOW: 1. Copy whiteboard HOMEWORK: 1. Make a good Help Sheet for tomorrow's quiz (5 pts) Std 3 1/2 sheet of 8.5x11" paper, one side only ========================================================== BASKET (Stamped): Journal 1/29 (anything you learned in Hydrate Lab) 1. Practice Quiz copy questions (just given & find), show calculations on calculation problems. On problems that are not calculations, show page # and give complete explanation of why.

Start your help sheet by copying this, every single word!!!! g mol particles chart Avo X g. = 1 mol 6.02 x part. = 1 mol part. (atoms or molecules) If you don't know how to use this, get into my room at lunch today or tomorrow for help on using this chart

6.02 x particles = 1 mol particles Mn molar mass 54.9 g Mn atoms = 1 mol Mn atoms 6.02 x Mn atoms = 1 mol Mn atoms SrCl 2 molar mass 158 g SrCl 2 molecules = 1 mol SrCl 2 molecules

Given: 3.90 mol SrCl 2 Find: ? molecules SrCl 2

Given: 3.90 g Mn atoms Find: ? atoms of Mn

Example of hydrate Calculations BaCl 2 X H 2 O Getting the moles of H 2 O Mass of evaporating dish = g Mass of dish and hydrated salt = g Mass of hydrated salt = ______ HEAT Mass of dish and dry salt = g BaCl 2 2 H 2 O Mass of hydrated salt = g Mass of dry salt = g BaCl 2 What is the formula of the hydrate of this salt? ___________

1/31/2013 Standards: 3 (Stoichiometry) Objectives: ● Quiz 3.1 (Ch 11.1, 11.2, 11.3, and 11.5) DO NOW: 1. Clear desk and floor. On your desk: pencil, eraser, calculator, scratch paper, scantron HOMEWORK: 1. SN - Ch 12.1 p (5 pts) Std 3 ========================================================== BASKET (Stamped): Help Sheets (5 pts) Std 3

1/31/13 Period here Quiz # here Quiz 3.1 Ch 11.1, 11.2, 11.3, and 11.5

CuSO 4 copper (II) sulfate

Put the following in order with smallest numer on top Quiz Scantron Chart Make 5 piles of paper 1. Quiz 2. Scantron 3. Chart 4. Help Sheet 5. scratch paper

2/1/2013 Standards: 3 (Stoichiometry) Objectives: ● Students will understand mass vs mol relationships in balanced equations. DO NOW: 1. How is the term mol ratio used in Ch 12.1? (hint: what are they comparing?) 2. Define stoichiometry 3. In groups of 4, determine and ask about the most difficult questions from last night's HW. HOMEWORK: 1. Ch 12.1, p (a-e) (3 pts) Std 3 2. Watch my video and take notes on everything you see on screen (vid on YouTube) (2 pts) Std 3 ========================================================== BASKET (Stamped): Journal (describe what you learned from SN Ch 12.1) 1. SN - Ch 12.1 p (5 pts) Std 3 Announcement Check website for extra credit

Multiply # correct by 3.75 to get how many points you earned Buy-backs for this quiz Wed next week at lunch.

___Fe 2 O 3 + ___Al ----> ___Al 2 O 3 + ___Fe mol atom gram ___Fe 2 O 3 + ___Al ----> ___Al 2 O 3 + ___Fe Calculations to get gram ratios use molar mass