1. Wed/Thurs March 11-12 Objective: Calculate the grams of the ingredients of a peanut brittle recipe Checkpoint: Given the chemical reaction: H 2 + O 2  H 2 O – Balance the reaction – If you have 2 moles of H 2, how many moles of H 2 O can you make? – If you have 1 mole of O 2, how many moles of H 2 O can you make? – If you have 2 moles of O 2, how many moles of H 2 do you need? Homework: – Finish Peanut Brittle handout (except Percent Yield) (Friday) – Mole review practice problems (Mole to Mole section) (Friday), rest of worksheet due Monday

2. H 2 + O 2  H 2 O 2 2 2 mol H 2 O 4 mol H 2

3. Class Competition Points 2 Liter soda bottles Friday class points as usual. – 1 extra bonus point for 2 empty 2 L soda bottles – 2 extra bonus points for 4 bottles – 3 extra bonus points for 6 bottles – 4 extra bonus points for 8 bottles – 5 extra bonus points for 10 bottles

4. Turn in Copper Hydrate Lab 26.27 moles of H 2 O 8.34 moles of CuSO 4 26.27 / 8.34 = 3.15 3 H 2 O : 1 CuSO 4

5. Activity Series Lab will be passed back Friday

7. Mole Conversions Quiz Come take it if you have not. If you got below a 10, you can re-take the quiz for up to a 10. -0.5 points for not writing units (mol, g, molec) Partial credit (1 point) for showing correct work, but wrong answer.

8. Mole to Mole Conversions Given.606 mole of sugar, how many moles of water do you need? Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle 0.606 mol sugar X mol sugar mol water = 5 1 3.03 mol water

9. Mole to Mole Conversions Given 0.0161 mole of baking soda, how many moles of corn syrup do you need? Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle 0.0161 mol B.S X mol B.S mol C.S = 2 1 0.0322 mol corn syrup

10. Mole to Mole Conversions Given 3.12 mole of butter, how many moles of peanuts do you need? Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle 3.12 mol butter X mol butter mol peanuts = 2 2 3.12 mol peanuts

11. Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle Start here get here.606 mol 0.0161 mol 3.12 mol

12. Peanut Brittle Lab Please donate $1 (not required, but appreciated) If you are allergic to peanuts, take precautions to not eat or touch them. Wipe down lab counters with wet paper towels. Use “DRY CUP” for peanuts, sugar, baking soda. Use “WET CUP” for corn syrup, water, butter. Check your calculations with your lab group before making peanut brittle. Bonus class point today for doing an excellent job of cleaning up.

13. Clean up procedures Lab counters wiped down (not sticky and nothing on it) Bowl is cleaned (it helps to heat up water in it) and wet/dry cups are washed. Spoon or chopsticks are clean Wet and dry cups on your lab space.