1. Chemistry Week 24 Please get out your Notebook and calculator!

2. Feb 26th, 2013 AGENDA: 1 – Bell Ringer 3 – Notes: Mole Conversion: Mole to Gram and Mole to Particle 5 – Work Time Today’s Goal: Students will be able to convert from moles to grams and moles to particles. Homework 1. Mole Conversions Wkst 1 – due tomorrow! (change to classwork assignment) 2. Work from Week 23 due by Friday

3. Tuesday, February 26 Objective: Students will be able to convert from moles to grams and moles to particles. Bell Ringer: One dozen cupcakes have a mass of 13.5 grams. What is the mass of 2.5 dozen cupcakes?

4. 2 MINUTES REMAINING…

5. Tuesday, February 26 Objective: Students will be able to convert from moles to grams and moles to particles. Bell Ringer: One dozen cupcakes have a mass of 13.5 grams. What is the mass of 2.5 dozen cupcakes?

6. 1 MINUTES REMAINING…

7. Tuesday, February 26 Objective: Students will be able to convert from moles to grams and moles to particles. Bell Ringer: One dozen cupcakes have a mass of 13.5 grams. What is the mass of 2.5 dozen cupcakes?

8. 30 seconds Remaining…

9. Tuesday, February 26 Objective: Students will be able to convert from moles to grams and moles to particles. Bell Ringer: One dozen cupcakes have a mass of 13.5 grams. What is the mass of 2.5 dozen cupcakes?

10. 10 seconds Remaining…

11. BELL- RINGER TIME IS UP!

12. Feb 26th, 2013 AGENDA: 1 – Bell Ringer 3 – Notes: Mole Conversion: Mole to Gram and Mole to Particle 5 – Work Time Today’s Goal: Students will be able to convert from moles to grams and moles to particles. Homework 1. Mole Conversions Wkst 1 – due tomorrow! (change to classwork assignment) 2. Work from Week 23 due by Friday

13. Tuesday, February 26 Objective: Students will be able to convert from moles to grams and moles to particles. Bell Ringer: One dozen cupcakes have a mass of 13.5 grams. What is the mass of 2.5 dozen cupcakes? 2.5 dozen x 13.5 grams = 1 dozen 2.5 x 13.5 g = 33.75 g

14. Mole Conversion  Obj: SWBAT convert between moles, grams and particles – Part 1  Date: 2/26/2013  Remember:  1 mole (mol) always = 6.02 x 10 23 particles  1 mole = molar mass of ANY substance  SO…. 6.02 x 10 23 particles = molar mass of ANY substance

15. Mole Conversion Ratios  The information for 1 mole can be used to create MOLAR RATIOS  1moleor molar mass of substance Molar mass1 mole  1 mole or 6.02 x 10 23 particles/atoms/molecules 6.02 x 10 23 1 mole

16. Mole to Gram Conversion  Imagine if you want to measure out a 1.5 mole sample of silver metal…?  Could you count out 1.5 moles?  But you can use molar mass to convert moles to grams, and you can measure grams. Molar Mass of Silver = 1.5 mole 107.9 g Ag 1 mole Ag... NO! x 107.9 g = 1 mole 1.5 x 107.9 g = 161.8 g Ag

17. Practice Problems  If you had a 7.5 mole sample of H 2 O, how many grams would you have? 1. Determine the molar mass. 2. Convert! (Watch units!) 1. H 2 O = 2xH = O = 18.0 g 1 mol 1. H 2 O = 2xH = O = 18.0 g 1 mol (2 x 1.0) + 16.0 2. 7.5 mole H 2 O x 18.0 g 1 mol = 7.5 x 18.0 g H 2 O = 135.0 g H 2 O 2. 7.5 mole H 2 O x 18.0 g 1 mol = 7.5 x 18.0 g H 2 O = 135.0 g H 2 O

18. Mole to Particle Conversion  Imagine if you want to know HOW MANY atoms are in 1.5 moles of silver metal…?  Could you count out those particles?  But you can use 6.02 x 10 23 to convert moles to atoms.  NOTE: you DO NOT need molar mass when converting to particles/atoms/molecules 1.5 mole... NO! X 6.02 x 10 23 1 mole = 9.03 x 10 23 atoms

19. Practice Problems  If you had a 7.5 mole sample of H 2 O, how many particles would you have? 7.5 mole H 2 O x 6.02 x 10 23 particles 1 mol = 7.5 x 6.02 x 10 23 particles of H 2 O = 4.52 x 10 24 particles of H 2 O 7.5 mole H 2 O x 6.02 x 10 23 particles 1 mol = 7.5 x 6.02 x 10 23 particles of H 2 O = 4.52 x 10 24 particles of H 2 O

20. Problem Solving Decision Tree Read the problem If moles and grams Calculate Molar Mass If moles  grams Multiply by molar mass Multiply by 6.02 x 10 23 If moles and particles If moles  particles