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DVC CHEM 108 - Unit 5b Study Topics

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HONORS CHEMISTRY UNIT 5b STUDY TOPICS VSEPR theory and Molecular Geometry ❏ Describe VSEPR theory. ❏ Identify the steric number (# electron domains) of the central atom. ❏ Determine the AXE formula for a molecule. ❏ Distinguish between the electron and molecular geometry for a molecule. ❏ Predict the electron geometry for a molecule. ❏ Predict the molecular geometry for a molecule. ❏ Draw the Lewis structure for a molecule, showing the correct molecular geometry in 3D space. ❏ Identify bond angles for a given molecular geometry. Hybridized Orbitals ❏ Describe hybridized orbitals. ❏ Identify the different types of hybridized orbitals (sp3, sp2, sp, sp3d, sp3d2 ) and describe its formation (example: one s-orbital + three p-orbitals = four sp3 hybridized orbitals). ❏ Identify the hybridization of an atom in the molecule. (Hint: think about how the steric # relates to the hybridization). Molecular Polarity ❏ Describe a bond dipole. ❏ Represent a bond dipole with a dipole arrow. ❏ Determine whether a molecule is polar or non-polar and explain in terms of net dipole. Intermolecular Forces ❏ Describe the difference between intramolecular forces (chemical bond) and intermolecular forces. ❏ Determine what type of intermolecular forces (dipole-dipole, hydrogen bonding, London dispersion, ion-dipole) are involved between molecules. ❏ Draw a diagram illustrating the various intermolecular forces involved between molecules.❏ Identify the most significant intermolecular force occurring between molecules. ❏ Rank the strength of the various intermolecular forces. ❏ Compare the strength of intermolecular attractions compared with the strength of ionic and covalent bonds. ❏ Describe how intermolecular forces affect properties of liquids (for example, boiling point, surface tension, viscosity). Types of Crystalline Solids ❏ Describe the main types of crystalline solids: ionic, metallic, covalent network, and molecular solids. ❏ Describe the bonding and properties (for example, melting and boiling points) of ionic, molecular, metallic, and covalent network crystalline solids. ❏ Rank the strength of various types of intramolecular and intermolecular

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