1. How can we observe the cohesion and adhesion of water?
What we can do to observe cohesion and adhesion of water is to create models to help us visualize each concept. These models can give us a better understanding of the concepts cohesion and adhesion. With the models,it is less hard for us to actually understand them and you can experiment with them.
2. In class, how did we model water molecules? How could this model be used to explain cohesion and adhesion?
In class we used a model to help us see how water molecules function. Some models that we created to show water molecules is that we created a model that our professors showed us,whiich was a model that included a penny and how we dropped droplets of water on the penny to see how the water is cohesive which means that it sticks onto the penny. This model also includes using ethanol and hexane which also shows how one of the two aren't as cohesive as the water but more adhesive,which means it doesn't stick to the penny.
3. Discuss one way in which either the cohesive or adhesive properties of water play an important role in the (choose depending on your group):
Atmosphere:
The cohesive properties of water play an important role in the atmosphere because if there's no water cycle then there isn't precipitation which means the water can't go into the atmosphere and it can't go into the hydrosphere where all the bodies of water and water structures are. That would be bad because then we won't have water supply to help us survive.
4. What is polarity? What causes a molecule to be polar? Give an example
Polarity is an over balance of electric charge in a molecule because the atoms have an "electron-hunger" which makes them stick together. What makes a molecule be polar is that since it keeps getting "hungry",it will make it easier for it to stick onto on another. An example of this is water is polar because the water molecules stick onto one another because of the "hunger" but the hexane and ethanol are not polar because their molecules aren't as "hungry" and it means that they don't stick onto another.
5. How do polar and non-polar molecules behave differently?
Polar molecules have more "electron-hunger" which means that they stick together and non-polar molecules dont have the same amount of "electron-hunger" which means that it won't stick to one another.