University:
Hunter College CUNY
Course:
CHEM 106 | General Chemistry Laboratory
Academic year:

2023
Views:

188

Pages:

2
Author:

gandujadqtrdj

VSEPR and Molecular Structure Lab Build your own models Introduction: Today, you are going to get the opportunity to be creative, while showing everyone what you have learned about covalent bonds. We have practiced drawing lewis dot structures for covalent bonds and have also studied the different VSEPR shapes. We are now going to put these two concepts together. The goal for the the lab today is to create realistic 3-dimensional models of covalent bonds using correct angle measures. Materials Mini Marshmallows Glue Straws Spaghetti noodles Pompoms Play-doh Regular Marshmallows Markers Plain white paper Molecular Geometries Linear Bent Trigonal Planar Tetrahedral Trigonal bipyramidal T-shaped Octahedral Square pyramidal Square Planar Procedure: Part 1: 1. You and your partner will draw a molecular geometry out of a bag. Part 2: 2. Then choose a molecule that represents your geometry and draw its structural formula on a sheet of paper. The teacher will then make sure it is correct before you can go on to Part 2. 1. Next you are going to get a molecular model kit. Your goal is to build your molecule using this set. 2. You will need to include a key that explains what everything represents. Example: Red ball=Oxygen 3. The teacher will check your molecule before moving on to the next step. Part 3: 1. Design a 3-D model similar to the one you just built. You can choose to make a ball-and-stick molecular model or space-filling molecular model. Examples of these could be found on pg 223 of your textbook. Your materials are listed above. 2. Along with the 3-D model, you will need a key that includes the molecular structure, formula, name and geometry. Make sure your key is neat and visible.

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