Molecular Bonds

Chapter 9: 3 Homework

Reading Preparation
WebLecture
Study Activity
Preparation work for chat
Online Quiz
Lab Instructions

Reading Preparation

Textbook assignment: Read Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 9: Section 3.

Study Notes

9.3 The Molecular Orbital theory views electrons as a resource for the whole molecule rather than dedicated to individual bonds between specific atoms. Instead of starting with bonds and looking at the electrons in them, we start with all available electrons and build the possible bonds. This theory allows us to account for molecular relationships that valence theory doesn't explain very well.

There are no equations for these sections.

Web Lecture

Read the following weblecture before chat: Molecular Orbitals

Kotz and Treichel, Chemistry and Chemical Reactivity Chapter 9: Section 3.

Study Activity

Videos for Chapter 9: Bonding and Molecular Structure

Review the Videos at Thinkwell Video Lessons.

Under "Molecular Geometry and Bonding theory: Molecular Geometry and the VSEPR Theory"
- Valence Shell Electron-Pair Repulsion Theory
- Molecular Shapes for Steric Numbers 2-4
- Molecular shapes for Steric Numbers 5&6
- Predicting Molecular Characteristics Using VSEPR Theory

Chat Preparation Activities

Essay question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.

Chapter Quiz

Required: Complete the Mastery exercise with a passing score of 85% or better.
Go to the Moodle and take the quiz for this chapter.

Lab Work

(Aligns to) AP #7 GUIDED INQUIRY — Conservation of energy effects of disturbing chemical equilibrium — Phases II & III

Carry out the procedure you designed to observe Le Chatelier's principle by modifying the concentration, volume, temperature, pressure, pH, products, or reactants of a solution at equilibrium, then suggest ways optimize the results of a reaction and increase product yield. Write your formal report and post it.

References:

APGIE Investigation 13 Equilibrium: Can We Make the Colors of the Rainbow?
IGHCE Lab 13.1 Observe Le Chatelier's Principle in Action
HSCMK XIII-1 Observe Le Chatelier's Principle in Action
There is no alternative lab for this exercise.

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