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12 05 23 Lecture 24 Second Part Chem 103

32:17

12 05 23 Lecture 24 Chem 103

1:52:57

11 28 23 Lecture 23 Chem 103

1:23:16

11 26 23 Problem Session 7 pm

1:11:48

11 21 23 Lecture 22 Chem 103

1:41:41

11 16 23 Lecture 21 Chem 103

1:44:52

12 07 23 Lecture 25 Chem 103

Continuing with Valence Bond Theory. sp hybrid orbitals. How do you figure out what type of orbital hybridization a given atom has? Count the electron groups! Remember that double and triple bonds are just one electron group.
4 groups? sp3. 3 groups? sp2. Two groups? sp. First make sure that your structure has all the lone pairs. Sometimes structures leave out the lone pairs. Put in any missing lone pairs, making sure all (non-H) atoms have an octet. Worked on Activity 7 of Chapter 8 activities. Similar problems are on Activity for the last day of class. We did not get to Molecular Orbital Theory so it will not be on the final.

มุมมอง: 249

วีดีโอ

12 05 23 Lecture 24 Second Part Chem 103

32:17

12 05 23 Lecture 24 Second Part Chem 103

มุมมอง 519 หลายเดือนก่อน

Starts with the second half of the C2H4 example, and does the CH2NH example. Starts acetylene example.

1:52:57

12 05 23 Lecture 24 Chem 103

มุมมอง 499 หลายเดือนก่อน

Polarity of Molecules and starting Valence Bond Theory. Unfortunately I must have stopped sharing about 2/3 to 3/4 of the way through and there is only audio after that. Because this happened, I made another video starting where the other one goes dark. It will be posted as Lecture 24 second part.

1:23:16

11 28 23 Lecture 23 Chem 103

มุมมอง 589 หลายเดือนก่อน

Geometry of molecules - review tetrahedral electron geometry and the molecular shapes this can lead to, do Trigonal planar and linear electron geometries and corresponding molecular shapes. Started polarity of molecules. Almost done with Chapter 7.

1:11:48

11 26 23 Problem Session 7 pm

มุมมอง 369 หลายเดือนก่อน

Review of some material for Exam 3

1:41:41

11 21 23 Lecture 22 Chem 103

มุมมอง 579 หลายเดือนก่อน

More on Lewis structures and Formal Charge calculations. Determning which resonance form for a molecule is best based on formal charge. (Guidelines for doing this.) Started molecular geometry unit with VSEPR Theory. Did four groups of electrons on central atom, leading to a tetrahedral electron geometry and three different types of molecular structures or shapes (tetrahedral, trigonal pyramidal...

1:44:52

11 16 23 Lecture 21 Chem 103

มุมมอง 3010 หลายเดือนก่อน

Lewis Structures. Instructions for drawing Lewis Structures of simple molecules. Resonance. Formal Charge. From 1:12 to 1:23, the screen was not shared and you can only hear the audio. Ends with showing Activity 3 (of Chapter 7), but we did not spend much time on that. Look at it, try to do it at home!

1:59:16

11 14 23 Lecture 20 Chem 103

มุมมอง 3410 หลายเดือนก่อน

This class started with more on Effective Nuclear Charge. Talked about how the periodic properties of atomic SIZE, Ionization Energy and Electron Affinity depend on the Zeff of the outermost electrons and n, the shell value. Talked about how these properties change across and down the Periodic Table. Talked about the Rare Gas Configuration and why is is where metals end up after losing electron...

1:47:08

11 09 23 Lecture 19 Chem 103

มุมมอง 3310 หลายเดือนก่อน

Effective Nuclear Charge, Filling orbitals with electrons - what order to use?, Electronic Configurations of atoms (Activity), Core and Valence electrons, Patterns in the Periodic Table, Handout on how all elements in a group have same outer shell electron configs, started Periodic Properties, Activity on how Zeff varies across and down the PT.

1:48:18

11 02 23 Lecture 18 Chem 103

มุมมอง 5110 หลายเดือนก่อน

When two videos towards beginning of class are shown, viewers cannot see them. To find the links, go to OneNote file from class notes and click on the links there. Reviewed conclusions of Neils Bohr. Moved on to electrons having wave-like properties. Standing Waves in 1-D, 2-D and 3-D (electron :waves" - orbitals!) These give probability distribution of where an electron may be found. Quantum n...

1:49:54

10 31 23 Lecture 17 Chem 103

มุมมอง 6010 หลายเดือนก่อน

There is a 20-minute portion of this video that is only audio - from 7:32 to 27:30. But otherwise the video is good. We are starting Chapter 6 on electronic structure and periodic properties of elements. This class begins with electromagnetic waves, goes on to the Photoelectric Effect, the Bohr model of the atom, line spectra of elements, and how the energy of a photon of light emitted as elect...

1:41:59

10 26 23 Lecture 16 Chem 103

มุมมอง 5710 หลายเดือนก่อน

Finish Calorimetry, Enthalpy is a State Function, Hess' Law, Manipulating and adding up Thermochemical Equations to get the Delta H for a desired equation. Standard Enthalpies, Standard Enthalpies of Formation. Using Standard Enthalpies of Formation to find Delta H's for reactions.

1:49:05

10 24 23 Lecture 15 Chem 103

มุมมอง 4210 หลายเดือนก่อน

The video from last class (10/19 before quiz) did not work. But it was only some review of Redox reactions and a short intro to Thermochemistry. The Thermo introduction was pretty much repeated today. Started with introducing Thermochemistry, progressed to what makes reactions absorb or release energy (it's all about breaking/making bonds). Watched a video of H2 O2 reaction forming water (explo...

1:46:54

10 17 23 Lecture 13 Chem 103

มุมมอง 5611 หลายเดือนก่อน

This class was about Redox or Oxidation-Reduction Reactions. We covered Metal Acid, Metal Salt, Combustion (or oxidation) of a metal, Combustion reactions for compounds containing C and H or C, H and O). You should be able to write products for these reactions. Metal activity was covered, and a whort list of a metal activity chart was given/explained. Oxidation number rules were given and expla...

1:46:17

10 12 23 Lecture 12 Chem 103

มุมมอง 6811 หลายเดือนก่อน

This class started with a short review of solubility, using the solubility chart, acids (strong and weak), bases, and what it means to be an electrolyte. Strong vs. weak electrolytes was covered. Most of the time was spent on writing the products of simple reactions involving ionic compounds and acids. Precipitation, and the Acid reactions Acid-Base Neutralization, Acid plus Carbonates and Acid...