1. Chemistry 12 March 2012 Today: Summarizing the process of stoichiometry, with 2 examples 1st 10 minutes: Filter your lab product and place on a glass dish in the drying oven Please turn in Stoichiometry worksheets and simulation assignment

2. The basic questions We have established that determining the balance of materials in reactions is based on fixed ratios. Knowing this, we can ask….. What is the limiting reactant? How much product can I produce? How much reactants do I need to produce a certain amount of product? How much reactant will I have left over?

3. The gram - mole issue Some molecules are heavier than others Chemical equations relate molecules to molecules and moles to moles You always have to convert grams to moles to do stoichiometry

4. Example 1: How much product? Plants combine carbon dioxide and water to form glucose. How much glucose can a plant produce if it is in a closed chamber with 100 g of water and 100 g of CO 2 ?

5. Example 2: How much reactants do we need? Iron (III) oxide can be used as a pigment to make orange paint. How much iron metal do we need to oxidize to produce 100 g of iron (III) oxide powder?

6. Other matters Please use the rest of today to filter and dry your product material - Friday, you can complete the lab handout and turn in for credit Friday we will also go over another stoichiometry example, and discuss 3rd quarter assessment projects

7. Today’s plan -- Dr. Interlandi’s 4 secret self-centered tips for high school seniors –giving you a leg up on the competition….

8. Tip 1 - Let people know you exist Example A: Call the admissions office, and let them know your situation Example B: If there’s a professor who does interesting things, go to their office, and ask how you can get involved Example C: Go to recitations and interact with teaching assistants who calculate your grade

9. Tip 2 - Do things for yourself Example A: If a class in the catalogue looks interesting, take it Example B: If there’s no class for what you want to learn, make one up Example C: Start a small business on the side - it’s free, and shows Chutzpa!

10. Tip 3 - Don’t take things as they are Example A: Unfair grade? if you don’t think your grade is fair, tell the professor Example B: If you get charged a late fee or parking ticket, politely contest it Example C: If the dorm food stinks, ask for a substitute

11. Tip 4 - Always look out for #1 Example A - Your friend needs help, but you’ve got to an exam - go and study, tell your friend to call mom. Example B - Take the work study job, but let them know if you need to STUDY. They will always let you (get paid) to do that Example C - If your family says they can’t afford it, do it anyway. Take out loans and work summers for your tuition.

12. Bonus philosophical tip Remember what W.E.B. DuBois said: –“The purpose of education is not to make men carpenters, but to make carpenters men” –And I elaborate: Use your post high school education to deepen your perspective of the world, so you can appreciate other viewpoints, make more informed decisions and be a more powerful force for good in the world. –(See it’s not really all about you after all)

13. Chemistry 16 March 2012 Today: Completing stoichiometry labs and discussing the Q3 assessment projects To start on your own: complete any lab measurements, calculations and questions in the 1st half of class. Check out research assignments on class wiki with extra time.

14. Q3 assessments You have the choice of two different projects for your Q3 assessment Both projects are due on March 30th, before we go on spring break A: Creative Stoichiometry Project (discuss and see handout) B: Chemical nomenclature brochure (see next slide)

15. Important features of brochure Sweet layout - it should look professional Polyatomic ions - include a page that lists the names, and discusses -ite and -ate endings System should show how to name ionic compounds, molecular compounds and acids System should explain how to get formula from name

16. Other ideas… Flow charts are useful - import from web (with references) or create your own This assignment is easiest if you already have some computer formatting skills!! Visit pwgwc.wikispaces.com for an example of how to layout a brochure