1. C OMPLETE THIS : What do I know about stoichio metry? What do I want to know about stoichio metry? What did I learn today about stoichio metry?

2. STOICHIOMETRY (Using balanced chemical equations to solve mole problems)

3. T YPES OF PROBLEMS 1. Mass—mass (grams to grams) 2. Mass—volume (grams to liters OR liters to grams) 3. Volume—volume (liters to liters)

4. W HAT DO COEFFICIENTS TELL US IN A BALANCED EQUATION ? 1. Mole ratio *** 2. Molecule ratio 3. Liter ratio (only works for gases) **** EXAMPLE: 2 H 2 + __O2 ------ 2 H 2 O 2: 1: 2

5. 1 MOLE OF A SUBSTANCE EQUALS : 1. Avogadro’s number of particles 2. Molar mass (g/mole) *** 3. 22.4 L of a gas (AKA molar volume) at STP(standard temp & pressure) ***

6. ACTIVATOR Define stoichiometry

7. V IDEO LINK www.khanacademy.org (Stoichiometry)

8. M ASS ----M ASS PROBLEMS 1. Balance the equation. 2. Underneath the equation, write what’s “given” and what’s “wanted”. 3. Convert grams to moles (using molar mass). 4. Convert moles of “given” to moles of “wanted” (using coefficient ratio). 5. Convert moles to grams (using molar mass). 6. The “given” determines sig figs for your answer.

9. IN ORDER TO SOLVE STOICHIOMETRY PROBLEMS, YOU MUST USE THE UNIT CANCELLATION METHOD This method involves crossing out top and bottom DIAGONAL units from each other in order to give you the unit that you want your answer in to end up ON TOP.

12. Given’s mass X 1 mole X unknown’s coeff X molar mass of unknown molar given’s coefff1 mole mass of given

13. www.gavirtuallearning.org Click on Resources, shared, science, chemistry, stoichiometry, Tab 5 You will see a list of the steps for solving mass-mass problems

14. E XAMPLE How many grams of sodium oxide are formed when sodium reacts with 42 grams of oxygen? 4 Na + ___O 2 ------- 2 Na 2 O 42 g ?g 42 g O 2 x 1 mole x 2moles Na 2 O x 62 g 32 g1 mole O 2 1 mole 42 x 2 x 62 =162.75 = 160 grams 32 x 1 x 1

15. How many grams of oxygen are required to produce 20.0 grams of water? 2 H2 + O2 -------- 2 H2O ?g 20.0 grams 20.0 g H2O x 1 mole x 1 mole O2 x 32 g O2 18 g 2 moles H2O 1 mole 20.0 x 32 18 x 2 =17.77 = 17.8 grams

16. ACTIVATOR WHAT ARE THE 3 TYPES OF STOICHIOMETRY PROBLEMS THAT WE WILL WORK?

17. P RACTICE PROBLEMS 1. How many grams of zinc chloride are produced when 50.0 grams of zinc metal react with hydrochloric acid? Zn + HCl ---------ZnCl 2 + H 2 ANSWER: 104 grams 2. If calcium oxide is prepared by heating calcium carbonate, how much calcium carbonate is required to produce 15.0 grams of calcium oxide? CaCO 3 --------CaO + CO 2 ANSWER: 26.8 grams

18. www.khanacademy.org (stoichiometry problem #1 and 2)

19. A CTIVATOR : Write the balanced equation for the reaction which we will be doing in LAB today.

20. E XTRA PRACTICE — MASS TO MASS 1. How many grams of copper(II) cyanide are produced when 1.250 g of copper (II) sulfate react? (Answer= 0.9046 g) 2. How many grams of iodine react to produce 4.63 grams of Iron (III) iodide?(Answer = 4.04 g) 3. How many grams of oxygen react with 25 grams of methane gas to produce water and carbon dioxide? (Answer = 100 g) 4. How many grams of water are produced from the same reaction in #3? (Answer 56 g)

21. http://www.youtube.com/watch?v=DNeawVXi YQw&feature=player_embedded

22. E XTRA PRACTICE PROBLEM If 9.90 grams of cuprous chloride react how many grams of cuprous sulfide are produced? ANSWER: 7.96 GRAMS

23. ANTICIPATION GUIDE— COPY EACH STATEMENT AND AGREE OR DISAGREE 1. The limiting reactant produces the most amount of product. 2. The opposite of a limiting reactant is the excess reactant. 3. Equations must first be balanced in a limiting reactant problem. 4. The limiting reactant is all used up after the reaction is over.

24. 2 TYPES OF REACTANTS LIMITING Is completely used up in the reaction Produces the least amount of product EXCESS Is still left over after the reaction occurs

25. ACTIVATOR State the difference between the limiting vs. the excess reactant

26. R ECIPE FOR BACON DOUBLE CHEESEBURGER 1 bun, 2 cheese slices, 4 bacon slices, 2 hamburger patties Ex: How many burgers can be made from 4 buns, 8 cheese slices, 16 bacon slices, and 8 patties? Ex: 3 buns, 6 cheese slices, 14 bacon slices, 4 patties? You will have which reactant(s) left over? Which reactant(s) will be used up?

27. T AKEN FROM WWW. GAVIRTUALLEARNING. ORG ( TAB 7) WWW. GAVIRTUALLEARNING. ORG You are making brownies for a bake sale. Each batch of brownies requires one box of brownie mix, 1/4 cup oil, 1/2 cup water, and 2 eggs. You have 12 boxes of brownie mix, 12 cups of oil, 12 cups of water, and 12 eggs. How many batches of brownies can you make?

28. 6

29. You are making goody bags for your little sister's birthday party. Each goody bag has 6 pieces of candy, 1 noise maker, 3 stickers, 1 bouncy ball, 5 tiny containers of play dough, and 2 tiny containers of bubbles. Your mom has purchased 48 pieces of candy, 6 noise makers, 54 stickers, 12 bouncy balls, 35 tiny containers of play dough, and 35 tiny containers of bubbles. How many goody bags can you make?

30. 6

31. The following is the list of ingredients to make ONE pizza. 400 g flour 50 mL water 10 g yeast 120 g sauce 250 g cheese 5 g oregano 5 g basil Your business has purchased 500 pizza pans, 60 kg of sauce, 100 kg of cheese, 2.5 kg of basil, 2.5 kg of oregano, 5 kg of yeast, and 200 kg of flour. You have as much water as you need. How many pizzas can you make?

32. 400

33. E XAMPLE 1 How many grams of sodium phosphate form when 50.0 grams of sodium hydroxide react with 22.0 grams of phosphoric acid? 68.3 g VS. 36.8 g LR= ?

34. Calculate the mass of aluminum hydroxide produced when 25 grams of aluminum chloride react with 25 gram of ammonium hydroxide. ANSWER: 15 grams LR= AlCl 3

35. MASS---MASS MADNESS 1---3, 8 4---6, 9, 10 ab, 11, 12, 13, 14

36. M ASS TO MASS BOOK PROBLEMS p. 311 practice #1a = 60.0 grams #1b = 27.0 grams #2 = 339 grams #3 = 2600 grams p. 311 section review #4 = 63. 3 grams p. 320 #10a = 1100 grams

37. ACTIVATOR NAME 2 THINGS YOU KNOW ABOUT A LIMITING REACTANT.

38. DEAR ABSENT STUDENT LETTER: Write a brief paragraph to an absent student explaining in your own words how to solve a mass—mass problem.

39. A CTIVATOR — WORD SPLASH List as many words or phrases as you can think of that relate to stoichiometry