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Entry Task: Jan 29 th -30 th Block 1

Entry Task: Jan 29 th -30 th Block 1. Calendar for this quarter– pick one up  New Seating arrangements What are we learning Second Semester? Grade distribution Revisit Amounts in Chemistry Chemcredit cards Notes on Moles. I can…. Describe how a mole is used in chemistry

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Entry Task: Jan 29 th -30 th Block 1

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  1. Entry Task: Jan 29th-30th Block 1 Calendar for this quarter– pick one up  New Seating arrangements What are we learning Second Semester? Grade distribution Revisit Amounts in Chemistry Chemcredit cards Notes on Moles

  2. I can… • Describe how a mole is used in chemistry • Relate a mole to common counting units. • Convert moles to numbers of representative particles and particles to moles.

  3. First Semester Chemistry Equations Substance react together Ionic & Covalent substance properties Bonding- Ionic and Covalent Valence Electrons- properties and bonding Electrons- Arrangement, Energy and Valance electrons Atoms- protons, neutrons and electrons Matter- Mixtures, Substances, Elements and Atoms Matter- properties and changes

  4. Second Semester Chemistry Nuclear Chemistry Organic Chemistry Energy involved in Chemical reactions Mixing states of matter- solutions and Acid/Base States of Matter- gas, liquid and solid with amounts Moles into grams of Substances- Stoichiometry Equations to amounts of substance- Moles Equations

  5. CalculatorsThis is a requirement!!!

  6. Pre-Lab Assignment Lab handout that has questions at the beginning of the lab for you to answer. AND you use this handout in lab as the instructions.

  7. NO Pre Lab Assignment This means- ALMOST DONE Sorta finished “Hang-on Mayhan- I’m almost done” Incomplete in ANY WAY Looks like you did it in 5 minutes No Pre-lab = Not prepared Not prepared = Not Safe Not Safe = No Lab Entry No Lab Entry = Lab on your own Within 1 week of lab or it’s a ZERO!! WITH A 30% penalty!!

  8. BEFORE LAB: These MUST be done: 1. Sign off pre-lab assignment 2. Stow backpacks/chairs, 3. Goggle on 4. Hair up/clothing secure.

  9. Tardies Three tardies (unexcused) = detention Each tardy/hall pass = 5 points from chemcredit card

  10. Grab a calculator You will need a calculator EVERYDAY!!

  11. Amounts How many “things” are in a pair? 2 things How many “things” are in a dozen? 12 things 144 things How many “things” are in a gross? How many “things” are in a mole? 6.02 x 1023 things 602,000,000,000,000,000,000,000,000 Trillion Billion Million

  12. 602,000,000,000,000,000,000,000,000 How large is large (6.02 x 1023)? If we hook a mole of paper clips end to end, it would wrap around the Earth 400 trillion times. If we stack sheets of paper a mole high, the height would reach the sun and back more than a million times.

  13. How many is a mole? Using the square on this paper, make as many dots as you can in 10 seconds. Ready?... Set… GO! Count the number of dots. Multiply that by 6. This is the amount of dots you can make in 1 minute. How long would it take you to make 1 mole of dots?

  14. DO THE MATH!! 6.02 x1023 dots 1 minute ___dots 1 hour 60 min 1 day_ 24 hours 1 year_ 365 days X X X = Hint: Multiply all the denominators (big number) turn it into scientific notation 6.02 x 1023 Place your denominator number here 2.94 x 107 Divide you whole numbers and subtract the exponents 2.04 x 1016 years. Add 16 zero’s!!

  15. Why do we need a unit of this size in chemistry? It represents a number of atoms, ions, molecules, or formula units large enough to be conveniently used in the laboratory.

  16. Atoms- like copper Cu- 1 mole of copper would have 6.02 x 1023 atoms of Cu Ions- like Na+1 - 1 mole of sodium ion would have 6.02 x 1023 ions of Na+1 Molecules- like CO2 - 1 mole of CO2would have 6.02 x 1023 molecules of CO2 Formula units- like NaCl 1 mole of NaCl would have 6.02 x 1023 formula units of NaCl NOTICE THE LABEL AFTER EVERY NUMBER!!!

  17. Atoms- like copper Cu- 2.0 moles of copper would have 12.04 x 1023 atoms of Cu OR 1.2 x 1024 atoms of Cu with 2 s.f. 3.5 moles of copper would have 21.07 x 1023 atoms of Cu OR 2.1 x 1024 atoms of Cu with 2 s.f. 0.50 moles of copper would have 3.0 x 1023 atoms of Cu

  18. Moles to Particles Conversions How many atoms are in a 0.50 moles or ½ a mole of copper? Do the math in your head. Cut the numbers in ½ (6.02 x 1023) 3.01 x 1023 Cu atoms Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 0.5 moles of Cu 6.02 x 1023 atoms -------------- = 3.01 x1023 atoms -------------- 1 mole of Cu = 3.0 x1023 atoms Place conversion here

  19. Moles to Particles Conversions How many molecules are in a 3.5 moles of SO2? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 3.5 moles of SO2 --------------- 6.02 x 1023 molecules = 21.035 x1023molecules --------------- 1 mole of SO2 = 2.1035 x1024molecules Place conversion here = 2.1 x1024 molecules

  20. Moles to Particles Conversions- Practice How many atoms are in 0.909 moles of silver? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 0.909 moles of Ag ------------- 6.02 x 1023 atoms = 5.47 x1023 atoms -------------- 1 mole of Ag 3 Sig Figs !!! Place conversion here

  21. Particles to Moles Conversions How many moles are in a 2.01 x 1052 atoms of silver? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 2.01 x1052 atom Ag ------------- 1 mole of Ag = 0.334 x1029 moles Subtract exponents 6.02 x 1023 atoms --------- Place conversion here = 3.34 x1028 moles of Ag

  22. Particles to Moles Conversions How many moles are in a 7.34 x 1044 formula unit of Calcium phosphate? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 1 mole of Ca3(PO4)2 7.34 x1044 f.u. Ca3(PO4)2 ------------- = 1.22 x1021 moles Subtract exponents 6.02 x 1023 f.u. --------- Place conversion here = 1.22 x1021 moles of Ca3(PO4)2

  23. Particles to Moles Conversions- Practice How many moles are in a 3.40 x 1096 molecules of carbon monoxide? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 1 mole of CO 3.40 x1096moleculesCO ------------- = 0.565 x1073 moles Subtract exponents 6.02 x 1023molecules --------- Place conversion here = 5.65 x1072 moles of CO

  24. Particles to Moles Conversions- Practice How many moles are in a 2.21 x 1070 formula units of copper II oxide? Stoichiometry- set up! Place starting amount here Place the units you want to get rid of across from each other 1 mole of CuO 2.21 x1070formula units ------------- = 0.367 x1047 moles Subtract exponents 6.02 x 1023 formula units ---------------- Place conversion here 3 Sig Figs and Sci notation!!! = 3.67 x1046 moles of CO

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