IB CHEMISTRY TOPIC 4 – BONDING
Testing Liquids for polarity
Results and Observations:
Increasing Order of Polarity Downwards
HEPTANE
PROPANONE
PROPANOL
ETHYL ACETATE
ETHANOL
DISTILLED WATER
ETHANE-1,2-DIOL
ETHANOIC ACID
Camilo Lovera Trujillo ...
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Increasing Order of Polarity Downwards
HEPTANE
PROPANONE
PROPANOL
ETHYL ACETATE
ETHANOL
DISTILLED WATER
ETHANE-1,2-DIOL
ETHANOIC ACID
Camilo Lovera Trujillo Testing Liquids for polarity
Evaluation / Improvements:
Camilo Lovera Trujillo Testing Liquids for polarity
Conclusion:
In conclusion, this practical helped us to find the relationships between the Lewis structure or the molecule structure and the deflection the substances caused when they were near to an electrically-charged rod. From the observations and results we can also conclude that the C atoms reduce the polarity of the molecules as they created positive center in the molecule. However, it was thanks to the O atoms n most of the molecules that their polarity was considerably increased as they were left with lone pairs which helped to create negative center even bigger than the positive ones and due to this, deflect more the streams. On the other hand, there’s a final conclusion to be made and is about the order of the polarity. Acids are the most polar substances just after the amides. In the case of Ethanoic Acid, we can see that it makes part of the most polar substances tested in this experiment as a result of the H bondings and the presence of the 2 atoms of O. Going down the list we will find: Alcohols, Ketones, Aldehydes, Amines, Esters, Ethers and Alkanes.
Camilo Lovera Trujillo Testing Liquids for polarity
Bibliography for Images of Lewis Structure and Molecular Structures:
Bibliography for additional Information: