1. Stoichiometry Inquiry Unit Driving Question: How do quantities of reactants affect the quantity of product that can be produced?

2. Baking Soda and Vinegar Activity Day 1

3. Warm Up Take everything off of your desk for the mole quiz.

4. Driving Question How do different amounts of reactants impact the inflation of a sandwich bag?

5. Homework Finish baking soda and vinegar activity

6. Agenda Warm Up Mol Quiz Baking Soda and Vinegar Activity Closure

7. Scenario The development of the air bag for automobiles required the combined efforts of both chemists and engineers. The basic idea is simple: in the event of a collision, a plastic bag rapidly inflates with a gas, preventing the occupant from hitting the dashboard or the steering column. There are still some unresolved issues regarding the use of air bags and the type of air bag that provides the most safety. With regard to the bag itself, it must: 1. Not inflate by accident. 2. Produce non-toxic materials. 3. Produce a gas that is cool. 4. Inflate very rapidly (20-60 milliseconds). 5. Be lightweight, easy to handle, and stable for long periods. Your task is to design an airbag that meets these requirements using the materials provided.

8. Baking Soda and Vinegar Activity Follow Ms. Ose’s directions for lab safety

9. Closure What strategies did you use to completely fill your air bag? What worked well? What did not work? What were some errors that occurred?

10. Airbags and Mole-Mole Ratios Day 2

11. Warm Up Watch the two video clips Ms. Ose shows about air bags Clip # 1 - https://www.youtube.com/watch?v=UTvPndZOP9g Clip # 2 - https://www.youtube.com/watch?v=dZfLOnXoVOQ Discuss with a partner – Why is airbag use in cars important? – What is the chemistry involved in air bag inflation? – Why is it important to calculate the amount of reactants involved in airbag inflation (and reactions in general)?

12. Investigative Questions: Why is the use of airbags in cars important? What is the chemistry involved in air bag inflation? Why is it important to calculate the amount of reactants involved in airbag inflation (and reactions in general)? How do the stoichiometric coefficients affect the production of product in a reaction? How is the mole - mole ratio in a chemical reaction used to show the connection between reactants and products?

13. Homework Complete mol-mol ratio practice

14. Agenda Warm Up Air Bag Discussion/ Stoichiometry Relevance Mole – Mole Ratio Notes Mole – Mole Ratio Practice Exit Ticket

15. Mol – Mol Ratio

16. How do the stoichiometric coefficients affect the production of product in a reaction?

17. Think about the air bag reaction 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) What is the ratio of sodium azide reacted to the amount of nitrogen produced?

18. Mole – Mole Ratios The coefficients of the balanced equation can be used as ratios This helps predict how much reactant is used in a reaction and how much product can be made

19. 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) What is the mole ratio of sodium azide to nitrogen? What is the mole ratio of sodium azide to sodium?

20. 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) How many moles of nitrogen are produced by decomposing 0.267 moles of sodium azide? How many moles of sodium azide are needed to react to produce 1.5 moles of nitrogen gas?

21. Mole – Mole Ratio Practice Complete the practice at your desk. Problems not completed in class, will be completed for homework.

22. Closure For the reaction below: N 2 + 3H 2  2NH 3 How many moles of hydrogen are needed to react with 4.5 moles of nitrogen to make ammonia?

23. Mixed Conversion Problem Inquiry Day 3-4

24. Warm Up Cu + AgNO 3  Cu(NO 3 ) 2 + Ag Balance the equation above. How many moles of silver are produced when 0.165 moles of copper are reacted with silver nitrate?

25. Investigative Question What is the process required to calculate the mass, volume, or quantity of particles using various stoichiometric methods?

26. Homework

27. Agenda Warm Up Mixed Conversions Group Inquiry Mixed Conversions Practice Air Bag Stoichiometry Calculation WS Closure

28. Mixed Conversions Group Inquiry

29. Group Work The class will be separated into groups of 4. Each group will be given a - mixed conversion stoichiometry word problem - large piece of construction paper - marker You will work in your group to solve the word problem. You will have approx. 7-10 min. to work. Write your work, including reaction, units and labels, on the construction paper. Remember to write large so that everyone in the room can read your work.

30. Groups Group 1Group 5 Group 2Group 6 Group 3Group 7 Group 4

31. Reminders Things that might be helpful to look at while you solve your problem: – Mole diagram – Mole diagram calculations – Mass-mass calculations – Cation/anion chart

32. To Do List Tape the word problem to the front of the poster paper. Write the problem number (in large font) in the top left corner of the paper. Write your names on the back of the paper. When you are done, bring the poster paper and marker to the teacher.

33. Time to Share It’s time to share with the entire class. Pick up a copy of the Mixed Conversion Problems worksheet. You may take notes on the Mixed Conversion Problems worksheet.

34. Time to Share I will choose a group to present. The group will come up to the front of the room, attach the poster paper to the board and then explain how the problem is solved. Be prepared to explain each step of the problem, including units and labels, and how you know that your process is correct. If we do not have time to have each group present today, we will continue tomorrow.

35. Mixed Conversion Problems 1.N 2 (g) + H 2 (g)  NH 3 (g) What volume of NH 3 (at STP) is produced if 25.0g of nitrogen gas is reacted with an excess of hydrogen gas? 2.H 2 SO 4 (aq) + NaOH (aq)  H 2 O (l) + Na 2 SO 4 (aq) How many molecules of water are produced if 2.46 g of sodium sulfate are produced in the reaction? 3.H 2 SO 4 (aq) + NaOH (aq)  H 2 O (l) + Na 2 SO 4 (aq) What mass of water is produced if 0.78 L of sodium hydroxide is reacted with sulfuric acid? 4.Zn (s) + HCl (aq)  ZnCl 2 (s) + H 2 (g) How many formula units of zinc chloride are produced when 36.8L of hydrochloric acid are reacted with zinc metal?

36. Mixed Conversion Problems 5.AlCl 3 (s)  Al (s) + Cl 2 (g) How many liters of chlorine gas are produced if 5.32 x 10 25 formula units of aluminum chloride are decomposed? 6.P 4 (g) + H 2 (g)  PH 3 (g) How many liters of phosphorous trihydride can be produced during the reaction of hydrogen gas with 0.084 L of P 4 ? 7.AgNO 3 (aq) + BaCl 2 (aq)  AgCl (s) + Ba(NO 3 ) 2 (aq) What mass of AgCl can be produced during the reaction of silver nitrate with 7.9 x 10 21 formula units of barium chloride?

37. Mixed Conversion Practice Complete the practice problems at your desk. We will review as a class

38. Air Bag Lab Calculations We will complete the calculations for the lab we will do next week in class

39. Wrap Up Thinking of all of the types of mole calculations, and mass-mass problems, that we have completed in the last several weeks… Which type of problem(s) was your Mixed Conversion problem similar to?