Molecular and polarity Shape Lab

Introduction:
We started with a Lewis diagram for the molecule. When there were more than two atoms,we focused on the central atom in the molecule. Count the number of atoms bonded to the central atom and count the number of unbonded pairs of electrons on the central atom and then determined the molecular shape correspondingly


CENTRAL ATOM MOLECULAR
Shape
Bonded Atoms Unbonded Electron Pairs
__________________________________________________
1 any number linear
2 none linear
2 1 or more angular
3 none flat triangular
3 1 triangular pyramid
4 none tetrahedral


Determining the polarity of the molecule requires an additional step. After determining the shape, look at whether the atoms surrounding the central atom are all identical to one another. Then we began making our figures.

Molecular Shape Molecular Polarity
_________________________________________________________________________________
linear yes nonpolar
no polar
angular - polar
flat triangular yes nonpolar
no polar
triangular pyramid - polar
tetrahedral yes nonpolar
no polar






WHICH STRUCTURE FROM THESE 4 PICTURES IS INCORRECT AND WHY? FEEL FREE TO POST YOUR ANSWER ON OUR COMMENTS





C6H12O6 was a structure we chose to use because of its ring structure or glucose ring. A basic sugar, this is a monosaccharide, a pentose sugar...

There are usually 3 common molecules of C6H12O6 that you will come across which are; Glucose, galactose and Fructose.

these molecules can combine to become di(2)saccharides such as maltose (2 Glucose') or Lactose which is the sugar in milk making it taste sweet.




A heavy gaseous hydrocarbon, C3H8,occurring naturally dissolved in crude petroleum, and also made artificially.
shape--octahedral
bond angle--90 degrees
polarity--yes
resonance--no




The chemical compound with the formula BF3. This colorless toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds.
shape--trigonal planer
bond angle--120
polarity--no
resonance--no



The organic compound with the formula C2H4. It is the simplest alkene. Because it contains a carbon-carbon double bond, ethylene is classified as an unsaturated hydrocarbon.
shape--octahedral
bond angle--90-109.5 degrees
polarity--no
resonance--no



a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state.

shape--linear
bond angle--180 degrees
polarity--no
resonance--no

Conclusion:

Overall we accepted our hypothesis because we learned how to make the Lewis structure shapes by a hands on activity; allowing us to learn and see first hand what they will look like and how to build them.

We found out that by looking at the problem and fixing it hands on we were better capable of understanding and learning these concepts. We were always drawing structures and making shapes,we completely learned the polarity and molecular shapes and figures of this lab.