Skip to main content
Chemistry LibreTexts

10: Review

  • Page ID
    42943
  • \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

     

    Introduction

    In the first part of Gen Chem 2 we will predict physical properties of matter like boiling/melting points, and physical behavior like predicting if two substances will mix with each other. The class will start by quickly reviewing intermolecular forces, which require knowing if a substance is polar or not. This review section contains material from General Chemistry 1 that you need to know for General Chemistry 2, but which General Chemistry 2 will not cover. Specifically, you need to review Lewis Dot Structures, Molecular Geometries and predicting if a molecule is polar. Here is an outline to give you a big picture perspective on why we need to review this.

    • Physical properties and behavior are influenced by the types of intermolecular forces matter has.
    • Determining intermolecular forces requires identifying if a molecule is polar or not.
    • Determining polarity requires knowing the geometry of the molecule.
    • Determining the geometry requires knowing the Lewis dot structure.

    So the workflow for predicting a molecules properties and behavior sort of follow the above in reverse order.

    Step 1: Determine Lewis Dot Structure (where are the bonds and where are the lone pairs of electrons)
    Step 2: Determine the Molecular Geometry (using VSEPR)
    Step 3: Determine molecular polarity from bond polarities and molecular symmetry

    This review will have 3 sections that relate to this workflow (10.1, 10.2 & 10.3). Each section is a very brief summary of key concepts with links to the relevant General Chemistry 1 chapters. This material will not be covered in lecture, but you are expected to know it, and it is fair material for exams and quizzes..

    Contributors and Attributions

    • Bob Belford


    This page titled 10: Review is shared under a not declared license and was authored, remixed, and/or curated by Robert Belford.

    • Was this article helpful?