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Experiment 13-Lewis Structures Prelab: Draw Lewis dot diagrams for the following molecules. N2 CH4 C2H6 C2H4 C2H2 CO3-2 Materials: Atom model kits Hypothesis: Can you predict the molecular structure and shape of a molecule from the formula? Procedure: For the compounds given, complete the tables for each of the following: a. Lewis dot structure. b. Shape (geometry) around the central atom. If there is more than one central atom, given the shape around each central atom. Sometimes each central atom may have the same shape (as in H2O2) or they may have different shapes (such as in C3H60). c. Bond angles for each of the central atoms. d. Is the molecule polar or non-polar? e. Build a molecular model of each compound and show it to your instructor, who will check the last box. Once you have a molecule checked off, break it apart to use the pieces for other molecules. f. Draw a picture showing the 3 dimensional structure of the molecule. 76 Experiment 13-Lewis Structures Molecular Model Report Sheet Compound I2 O2 CO CO2 SO2 H2O Name:________________________ Lewis Dot Structure Shape Bond Angles Polar /Non-Polar 3D Drawing Model Checked Experiment 13-Lewis Structures Compound H2O2 NH3 N2H4 HCN NO3- SO4-2 Lewis Dot Structure Shape Bond Angles Polar /Non-Polar 3D Drawing Model Checked 77 78 Experiment 13-Lewis Structures
