2. Catalyst Calculate the number of moles of carbon dioxide produced when 2 moles of oxygen gas (O 2 ) are reacted. 2 C 2 H 2 + 5 O 2 ---> 4 CO 2 + 2 H 2 O End

3. “Whoosh” Bottle

4. The Reaction 2CH 3 OH + 3O 2  2CO 2 + 2H 2 O If I have 52 g of CH 3 OH, how do I determine the number of grams of H 2 O produced?

5. Rate Yourself! Using your learning logs, rate yourself 1 – 4 on LT 4.1, 4.2, 4.3, 4.4, and 4.5 When you’re done, take out your stoplight cards so I know you’re ready to go for today!

6. Lecture 4.5 – The Big One: Grams to Grams and Complex Stoich!

7. Today’s Learning Targets LT 4.5 – I can convert from moles of one compound to moles of another compound using the mole ratio from a balanced chemical reaction. LT 4.6 – I can convert from grams of one compound to grams of another compound. LT 4.8 – I can complete a complex stoichiometric conversion that incorporates molarity, particles, mass, moles, and volumes of substances.

8. Grams of Substance A Grams of Substance B Volume of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A Focus for Last Unit

9. Review: What is a mole ratio?

10. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

11. II. Mole Ratios The coefficients in a balanced equation represent the moles of each substance. These coefficients can be used as a conversion factor known as a mole ratio Mole ratios allow for us to convert between moles of two substances

12. Mole Ratio for Mg to Mg 3 N 2 3Mg + N 2  Mg 3 N 2 Moles Mg Moles Mg 3 N 2 3 moles 1 moles

13. Quick Review You have 14 g of CH 4, then how many moles of CH 4 do you have? Re-adjust your stoplight cards

14. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

15. How do we convert grams of one substance to grams of another substance?

16. I. Converting Grams to Grams To go from grams of one substance to grams of another substance, we simply combine these steps We know how to go from grams to moles of one substance and moles of one substance to moles of another substance

17. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

18. Class Example If you react 360 g of C 6 H 12 O 6 with excess O 2 in the following reaction: C 6 H 12 O 6 + O 2  CO 2 + H 2 O How many grams of H 2 O did you react in this reaction?

19. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

20. Table Talk The Whoosh bottle reaction also involves the following combustion: C 2 H 6 O + O 2  CO 2 + H 2 O If I start with 40 g of C 2 H 6 O, then how many grams of H 2 O will be produced?

21. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

22. How do I complete complex stoichiometry problems?

23. My Turn! If we place 65 g of NaN 3 in the steering wheel and the following reaction occurs: NaN 3 (s)  N 2 (g) + Na (s) How many particles of N 2 do you have after the reaction?

24. Grams of Substance A Grams of Substance B Molarity of Substance B Atoms of Substance A Moles of A Moles of B Atoms of Substance B Molarity of Substance A

25. How Can I Follow the Car? Checklist! Use it to chart your progress! Keep it with you in the beginning, and then attempt problems without it so that you can master everything on your own!

26. CHECKLIST Solving Stoichiometry Problems 1.Make sure your equation is balanced. If not, balance it. 2.In your equation, circle and write an “F” by what you are trying to find. 3.In your equation, put a box around and write a “G” around what you have been given. 4.Follow the path on your graphic organizer from G to F and list/calculate the necessary conversion factors: Grams to Moles = Molar Mass Moles to Moles = Mole Ratio Molarity to Moles = Volume Particles to Moles = Avogadro’s # 5.Write down the number and units of given and multiply by the conversion factors 6.Make sure all units cross out on top and bottom until you arrive at the desired unit. 7.Celebrate your Victory! Example: C 6 H 12 O 6 + 6 O 2  6 CO 2 + 6 H 2 O F G

27. SUMMARIZE

28. Rate Yourself! Using your learning logs, rate yourself 1 – 4 on LT 4.5 and now 4.6!

29. Note-Taking and Wikispaces If you think you need more time to digest all of this, let’s get you started on some note taking to make your work easier! Open up your computer and get started on Videolecture.4.5.Grams to Grams and wikispaces

30. Step-by-Step Stoichiometry Think you just need to work on the basics before you get to the big stuff? Open your computers and start 4.5.Step-by-Step Stoichiometry as it goes from basics to advanced. Write down your struggle areas in your notebook!

31. The Great Chemistry Heist If you’re ready to rock and roll then learn how to rob a bank with Mr. Astor by determining the appropriate amount of grams of iron needed to break into the vault from grams of thermite!

32. For Those Who Conquer All: It is 1918 and you have enlisted in being a research assistant for Fritz Haber (what can we say…you love chemistry) Around the room, there are 8 different calculations that you need to perform to destroy…ahem I mean SAVE THE WORLD! Grab yourself a lab coat and get to it! Haber Research Assistant

33. Mustard Gas

34. How to Make Mustard Gas? (C 2 OH 5 ) 2 S + 2 HCl → (C 2 H 4 Cl) 2 S + 2 H 2 O

35. Uh Oh… A carton of chlorine gas gets released in the lab You suffocate on your own fluids Guess you shouldn’t have taken that job…

37. Closing Time Lab Report Next Week! Homework 4.5 – Grams to Grams and Complex Stoich