1. Period 3 Advanced Chemistry
Bell Task-Make a Prediction: Using your Chemistry knowledge, order the following substances in order of increasing Boiling Points-Ne, HF, H2, BaCl2. Explain why you chose that order!
Agenda-
Complete Bell task
Demo
Dipole Moment/Calculations
HW: Worksheet

2. Bell Task Answer- H2, Ne, HF, BaCl2 Substance Boiling Point H2 20 K Ne

3. Class Expectations:
Collect HW more often for a grade
Daily Assessments
Labs-More lab technique needed
Exams will be more comprehensive
Study/Practice problems
Weekly agenda will be given
Calculate data before you leave on lab days
Read lab prior to lab class!
Do not "cram" the night before an unit exam-study often!
See me for help when needed
Let me know if there is anything else I should add to this list!

4. Guided Questions
·Examine the forces responsible for properties of Liquids and Solids
·What happens during transitions between s/l/g and the effects of temperature and pressure during these transitions

5. Solid/Liquid/Gas Characteristics

6. Develop the Idea of Bond Dipoles and Dipole Moment
Why do some molecules and compounds exist as a solid, liquid or gas phases?
Ideas????
Develop the Idea of Bond Dipoles and Dipole Moment

13. The iodine monobromide molecule, IBr, has a bond length of 2
The iodine monobromide molecule, IBr, has a bond length of 2.49 angstroms and a dipole moment of 1.21 D.
Which atom of the molecule is expected to have a negative charge?
Calculate the effective charges on the I and Br atoms in units of the electronic charge e

20. Period 3 Advanced Chemistry
Bell Task-Science Trivia on your desk! Answer as many questions as you can within 5 minutes!
Agenda-
Bell task
Review Dipole values - Table
Types of Intermolecular forces

22. They are, however, strong enough to control physical properties such as boiling and melting points, vapor pressures, and viscosities.
These intermolecular forces as a group are referred to as van der Waals forces.

23. Ion-Dipole Interactions
Types of Intermolecular Forces
Ion-Dipole Interactions

24. Ion-Dipole Interactions
·A fourth type of force, ion-dipole interactions are an important force in solutions of ions.
·The strength of these forces are what make it possible for ionic substances to dissolve in polar solvents.

25. occurs in polar covalent molecules as a result of neighboring partial + and partial - charges

28. London dispersion-occurs in all molecules and individual atoms and is a result of motion of e-
London dispersion forces, or dispersion forces, are attractions between an instantaneous dipole and an induced dipole.
·These forces are present in all molecules, whether they are polar or nonpolar.
·The tendency of an electron cloud to distort in this way is called polarizability

32. Hydrogen bonding arises in part from the high electronegativity of nitrogen, oxygen, and fluorine.
Also, when hydrogen is bonded to one of those very electronegative elements, the hydrogen nucleus is exposed.

34. Assessment
Which IMF is present in the following (There may be multiple IMF present for each substance)
1. NH3
2. O2
3. Kr
4. CH3CH3
5. CH3OH
6. HCl
7. CCl4
8. CH3NH2
9. HF
10. H2O

35. Bell task
Discrepant event-Using the beaker filled with water and ice, explain in detail why ice is less dense than liquid water!
Agenda
Bell task and review
Review Van der waals forces
Finish Hydrogen bonding notes
Assemble CH­3F and Methyl Amine (CH3NH2)
Mini assessment
Penny activity
Viscosity and Surface Tension notes
Quiz tomorrow section 10.1 through 10.4 including page 365

38. The hexagonal shape of a snowflake

39. Arrangement of H2O molecules in ice

40. Each hydrogen atom in one H2O molecule is oriented toward a nonbonding pair of electrons on an adjacent H2O molecule
Its open arrangement optimizes the hydrogen bonds to 4 other H2O molecules-thus creating an open cavity. As solid ice melts the motion of the water molecule causes the structure to collapse.