1. Tuesday, February 17th, 2015 None!
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
None!
Objective: We will discuss intra and intermolecular forces.
Catalyst:
Continue on your Intermolecular Forces Notes sheet:
What is the difference between “intramolecular forces” and “intermolecular forces”? D

2. Homework What is hydrogen bonding?
What causes London Dispersion forces?
Rank the following intermolecular forces from weakest to strongest: dipole-dipole, ionic forces, dispersion forces, hydrogen bonds.
Rank the following intramolecular forces from weakest to strongest: ionic bonds, polar covalent bonds, nonpolar covalent bonds.

3. Homework What is hydrogen bonding?
The attraction between hydrogen and Oxygen, Fluorine, and Sulfur atoms in other molecules.
What causes London Dispersion forces?
Temporary dipoles in nonpolar molecules.
Rank the following intermolecular forces from weakest to strongest: dipole-dipole, ionic forces, dispersion forces, hydrogen bonds.
Dispersion forces, dipole-dipole, hydrogen, ionic forces
Rank the following intramolecular forces from weakest to strongest: ionic bonds, polar covalent bonds, nonpolar covalent bonds.
Ionic bonds, polar covalent bonds, nonpolar covalent bonds

4. Announcements Lab starting Wednesday. Test MONDAY!!
Lab Report Due the following Wednesday!
NO LATE REPORTS ACCEPTED!!
Test MONDAY!!

5. Agenda
Catalyst
Intermolecular Notes
Exit Slip/Homework

6. Intermolecular Forces
Influence the boiling point and melting point of a substance. The stronger the force the higher the melting and boiling point.
gas
liquid
*Break through intermolecular forces when going from a liquid to a gas– NOT intramolecular!

7. Intermolecular Forces
Based on your observations, which beaker held the substance with the weakest intermolecular forces?

8. Intermolecular Forces
4 different types of intermolecular forces exist
Ionic – attraction of + and - ions

9. Intermolecular Forces
Hydrogen – attraction of H to very electronegative atoms (O, F, N)
Dipole-Dipole – attraction between partially positive and partially negative ends of polar molecules
London Dispersion – attraction between non-polar molecules because of dipole moments

10. Ionic Intermolecular Forces
Occur between ionic compounds
Strongest attraction due to the positive and negative ions
Crystal lattice structure formed due to attraction between molecules
Examples: Na---Cl, K---Br, Ca---Cl

11. Intermolecular Forces
Intramolecular Bond
Intermolecular
Force
Force Strength
Ionic
Ionic Force
strongest
Covalent: Polar
Hydrogen Bonding
weak
Dipole-Dipole
Covalent: Nonpolar
London Dispersion
weakest

12. Card Sort
With your elbow partner, sort the cards as described on the half sheet. Then, answer the questions on the half sheet in your notes.
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

13. Distilled Water vs Salt Water
Forces present in distilled water:
Dipole-Dipole
Hydrogen
Forces present in salt water:
Dipole-Dipole
Hydrogen
Ionic
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

14. Explain: Elbow Partner Discussion
Sugar is a covalent compound and salt is an ionic compound. Based on what you learned today, why will sugar have a lower melting point? Explain using the vocabulary from the lesson.
Sucrose
NaCl

15. Practice!
What type of intermolecular forces will be present in a beaker full of:
NH3?
H2O?
LiBr + water?
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

16. Answer the Critical Thinking Questions
In your notes, answer the critical thinking questions on the back of the classwork half – sheet.
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

17. Exit Ticket Idk Mastered 1 2 3 4 5 Answer the following questions:
Answer the following questions:
1.) Rank the following intermolecular forces from strongest to weakest: dispersion, hydrogen, ionic, dipole-dipole
2.) What forces would be present in a container of sugar water vs a glass of salt water? Based on these forces, which container would evaporate first?

18. LAB DAY All food and drink MUST be put away!
Pick up your binders and take out the sheets from Wednesday. You will need your sheets and something to write with.
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

19. CLEAN UP PROCEDURE Give the lab handouts back to Ms. Kline.
Throw away ALL used paper towel.
Leave all droppers in the appropriate beakers AT THE TOP OF THE LAB TABLES.
Make sure all beakers are covered with the appropriate foil.
All pennies should be accounted for.
Tables should be wiped down with a Clorox wipe.
Call Ms. Kline over to check when you are done.
So, this is not REALLY what is happening, but going into a deeper discussion could cause more confusion and I think a surface level discussion can work at this moment.

20. Monday, February 23rd, 2015 Study for test!
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
Study for test!
Objective: We will review for the exam.
Catalyst:
Pick up a whiteboard from the crate at the front.
Take out homework from last week! D

21. Homework What is hydrogen bonding?
The attraction between hydrogen and Oxygen, Fluorine, and Nitrogen atoms in other molecules.
What causes London Dispersion forces?
Electron movement in nonpolar molecules.
Rank the following intermolecular forces from weakest to strongest: dipole-dipole, ionic forces, dispersion forces, hydrogen bonds.
Dispersion forces, dipole-dipole, hydrogen, ionic forces
Rank the following intramolecular forces from weakest to strongest: ionic bonds, polar covalent bonds, nonpolar covalent bonds.
Ionic bonds, polar covalent bonds, nonpolar covalent bonds

22. Announcements Tutoring today after school Test WEDNESDAY
Lab report due FRIDAY
Remember, you are writing about only ONE of the experiments!

23. Agenda
Catalyst
Lab Review
Study for test

24. Lab Review – Temp.
Which substance had the greatest temperature increase?
What does that tell us about the intermolecular forces?
Which had the smallest temperature increase?
What does this tell us about the intermolecular forces?

25. Lab Review – Temp.
The more the temperature decreases, the faster the substance evaporates!
Oil – a really BIG molecule – it cannot evaporate as quickly, even though we may have expected it to, because it is nonpolar, so it has the weakest intermolecular forces.

26. CHECK: Was your hypothesis supported or not?
My hypothesis that _____________ was (supported/rejected) because ____________________.

27. Lab Review - Penny
The penny held the greatest number of drops of which substance?
What does that tell us about the intermolecular forces?
The penny held the fewest drops of which substance?
What does that tell us about intermolecular forces?

28. Lab Review - Penny
The greatest number of drops held = strongest intermolecular forces!
Fewest drops = weakest forces

29. CHECK: Was your hypothesis supported or not?
My hypothesis that _____________ was (supported/rejected) because ____________________.

30. Answer: Cations are formed when atoms lose electrons
Ionic Bonding Basics
How are cations formed?
Answer: Cations are formed when atoms lose electrons

31. Ionic Bonding Basics What are the properties of an ionic compound?
Answer: High melting point, crystalling solid at room temp, high conductivity in water

32. Ionic Bonding Basics
Draw the Lewis dot diagram for Copper (II) Chloride
Answer:

33. Transition Metals and Polyatomics
What is the charge on the transition metal in FeO2?
Answer: 4

34. Transition Metals and Polyatomics
What is the formula for Iron (III) Sulfate?
Answer:
Fe2(SO4)3

35. Covalent Bonding Basics
How are covalent bonds formed?
Answer:
When nonmetals share electrons with nonmetals

36. Covalent Bonding Basics
If two nonmetals share 4 electrons, how many pairs, or bonds, is that?
Answer: 2

37. Covalent Bonding Basics
What are the properties of covalent compounds?
Answer: low melting point, brittle, not conductive, dissolves well in water

38. Lewis Dot Structure of Covalent Compounds
Draw the Lewis dot diagram for CS2
Answer:

39. Lewis Dot Structure of Covalent Compounds
Draw the Lewis dot diagram for Nitrate.
Answer:

40. Lewis Dot Structure of Covalent Compounds
Is the following compound polar or nonpolar? Explain your answer.
Answer: Polar because more electrons are around nitrogen (EN diff)

41. Writing Formulae for Covalent Compounds
What is the name for CCl4?
Answer: Carbon Tetrachloride

42. Writing Formulae for Covalent Compounds
Name the compound with the formula C3H8.
Answer:
Tricarbon Octahydride

43. Molecular Polarity What is a polar compound?
Answer: A polar compound is a covalent compound that does not share electrons equally.

44. Molecular Polarity and IMF
What type of INTERMOLECULAR forces would occur with the molecule HI (hydrogen monoiodide)
Answer: Dipole-Dipole

45. Answer: HF because the electronegativity difference is greater
Molecular Polarity
What would be MORE polar: HBr or HF? Why?
Answer: HF because the electronegativity difference is greater

46. Molecular Polarity and IMF
Finish the statement: The hydrogen bonding intermolecular forces ONLY occurs when the hydrogen from one molecule is attracted to:
Answer: N, O, or F of ANOTHER molecule

47. Molecular Polarity and IMF
Draw two water molecules, label each atom (Oxygen or Hydrogen) as slightly positive or negative and the intermolecular forces between the molecules. Be sure to label the intermolecular force.
Answer:

48. Molecular Polarity and IMF
What is the strongest intermolecular force?
Answer:
Ionic

49. Molecular Polarity and IMF
Why does distilled water have a lower boiling point than salt water?
Answer:
Distilled water only has hydrogen bonding as an intermolecular force while salt water has ionic and hydrogen bonding

50. Molecular Polarity and IMF
Would Cl2 or HCl have a higher boiling point? Why?
Answer: HCl would have a higher boiling point due to dipole-dipole forces that are stronger than London Dispersion forces