VSEPR Laboratory worksheet, Slides of Chemistry

Download VSEPR Laboratory worksheet and more Slides Chemistry in PDF only on Docsity! Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Name: Period: Seat#: Purpose: To construct a series of compounds using the VSEPR model and to use your model to determine the type of bonding and hybridization, and the geometry around each central atom. Pre-Activity Questions: The VSEPR model is based on the premise that electron pairs around a central atom will position themselves to allow for maximum separation. Instead of writing an actual Background Paragraph, just answer these questions below. 1) What does VSEPR stand for? 3) Name the five different electronic geometries, and the eleven different molecular geometries. 2) Explain why pairs of electrons around a central atom repel each other. Materials: - Computer/Laptop - Color pencils/markers Procedure: 1. Construct a 3D model for each compound using the online PhET simulation, and then sketch onto your paper. a. https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html b. Click to turn on the following:  Lone pairs  Bond angles  Electronic and Molecular Geometry c. Click in the bottom right corner where it says “PhET” and there are three vertical dots 2. Click options, then “projector mode” – it makes the background white so it is much easier to see things (I think so at least!). 3. Draw Lewis Structure 4. Determine the following for each atom: a. Number of bonded atoms on center atom, number of lone pairs on center atom. b. AXE formula (A center atom, X number of atoms bonded to the center atom, E number of lone pairs on the center atom) c. Steric Number 5. Using the information from Step 2 and a VSPER chart (which should be memorized!), determine the following: a. Electronic Geometry (linear, trigonal planar, tetrahedral, trigonal bi-pyramidal, or octahedral) b. Molecular Geometry (linear, trigonal planar, bent, tetrahedral, trigonal pyramidal, trigonal bi-pyramidal, seesaw, T-shaped, octahedral, square planar) c. Bond angle between the atoms attached to the central atom. (Based on the molecular geometry) d. Type of hybridization of the central atom in each molecule – if any (sp, sp2, sp3, sp3d, sp3d2 – remember, d hybridization may not be real!) Worksheet #10 Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch NO3 — AX3 # v.e- = # bonded atoms on A 3 # of lone pairs on A 0 Steric Number Molecular Geometry Hybridization 3 Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch SiCl4 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch CO2 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch SF4 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch ClF3 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch BrF5 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch N2 # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Molecular Formula AXE Formula Lewis Structure Electronic Geometry Bond Angle 3D Sketch NH4 + # v.e- = # bonded atoms on A # of lone pairs on A Steric Number Molecular Geometry Hybridization Done early? You can try doing these too! CCl4, NH3, H2O, SCl2, I3-, SO2, ICl4-, AsF5, IF4 +, H3O+, TeF5 -, HCN, IOF5, BrF3, SO4 2-, CO3 2- Another teacher made some online card making practices for VSEPR shapes! (please let me know if these links stop working)  AXE Formulas and Geometry Names https://tinyurl.com/bku42kb6  Shapes and 3D Models https://tinyurl.com/33357fmc  AXE Formulas and 3D Shapes https://tinyurl.com/yjsa39xm