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10: Review

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    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.

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