Model of Molecules Problem: Can we use the molecular formula to predict the shapes of small molecules? Hypothesis: Yes, I think we can use the molecular formula to predict the shape of the small molecules because when we use the Lewis dot Structure to now how the atom looks like then we put the valence electron. Procedure 1) Use the toothpicks and modeling clay to make models for each of the molecules given in the Pre lab assignment. Make sure the toothpicks stick out an equal distance from the center clay ball (make sure this distance is the same for all molecules; in this way we can compare measurements for different molecules. ) Use the toothpicks for both bonding pair and lone pairs.
2) Use the ruler to make sure the ends of the toothpicks are as far apart from each other as possible. Measure this distance. 3) Measure the bond angles between the toothpicks Molecule Distance between Ends of Toothpicks Bond angles Electron Pair Geometry Shape HCN 5. 5 180 Linear O 3 5 120 Trigonal Planar CCl 2 H 2 7. 5 109. 5 Tetrahedral H 2 CO 7.
5 120 Trigonal planar H 2 S 5. 5 109. 5 Bent PH 3 8 109. 5 Trigonal pyramid Analysis And Conclusion 1) PH 3 has the longest distance between the end of each toothpicks. O 3 has the shortest distance between the toothpicks. 2) Yes, they have the same geometry but they don’t have to have the same shape.
3) No, they do not have the same geometry, sometimes they do. No, they do not necessarily have the same shape. 4) The toothpicks represent 2 electron. 5) If the electrons are too close to each other it would mess up the shape. Yes, we can because when we put them in the order they are suppose to be in it will show us how the small molecule will look like..
The Essay on One Of The Macromolecules Make Life Makes
RED 1. Chloroplasts are small containers, which hold chlorophyll. 2. Endo symbiosis is the hypothesis which states that mitochondria started as bacteria absorbed by single celled organisms. 3. The cell theory is a theory that tells of information known about cells. 4. When reproducing, to create offspring you must pass on your own DNA. 5. Gamete is the reproductive cell, which contains half the ...
