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Chemistry Week 24

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

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Chemistry Week 24

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  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 • Mole Conversions Wkst 1 – due tomorrow! (change to classwork assignment) • 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. 2MINUTES 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. 1MINUTES 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 • Mole Conversions Wkst 1 – due tomorrow! (change to classwork assignment) • 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 1023 particles • 1 mole = molar mass of ANY substance • SO…. 6.02 x 1023 particles = molar mass of ANY substance

  15. Mole Conversion Ratios • The information for 1 mole can be used to create MOLAR RATIOS • 1mole or molar mass of substance Molar mass 1 mole • 1 mole or 6.02 x 1023 particles/atoms/molecules 6.02 x 1023 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 ... NO! • 107.9 g Ag • 1 mole Ag • x107.9 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 H2O, how many grams would you have? • Determine the molar mass. • Convert! (Watch units!) 1. H2O = 2xH = O = 18.0 g 1 mol 2. 7.5 mole H2O x 18.0 g 1 mol = 7.5 x 18.0 g H2O = 135.0 g H2O (2 x 1.0) 16.0 +

  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 1023 to convert moles to atoms. • NOTE: you DO NOT need molar mass when converting to particles/atoms/molecules 1.5 mole ... NO! • X6.02 x 10231 mole 9.03 x 1023 atoms =

  19. Practice Problems • If you had a 7.5 mole sample of H2O, how many particles would you have? 7.5 mole H2O x 6.02 x 1023 particles 1 mol = 7.5 x 6.02 x 1023 particles of H2O = 4.52 x 1024 particles of H2O

  20. Problem Solving Decision Tree Read the problem If moles and grams If moles and particles If moles  particles Calculate Molar Mass Multiply by 6.02 x 1023 If moles  grams Multiply by molar mass

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