Sunday, January 16, 2011

Homework 1-12-11

Prepare to present the results of the Liquids/Surfaces experiment.

Items to present:

1. pictures of observations
2. collected data
3. data in a graph/plot/table
4. conclusions based on data related to the molecular attractions and/or repulsions of the various chemicals or materials observed.

1. Contact solution on wood table.
When I observed the contact solution spread out fast at first, then settled into a circle.  I used a nickle for a size comparason. The contact solution stayed in a circle on the wood table. The circle was slightly smaller than a nickel and not as thick. 
 2. Contact solution on wood table with oil.
For the second experiment I first covered the wood table with cooking spray to give the surface an oily feeling.  When I dropped the contact solution onto the surface it splattered and did not make the perfect circle like the first experiment without the oil. The contact solution on the oily table had oval shape and was very thin. The contact solution was slightly smaller and much thinner than a nickel.
 3. Mouthwash on a paper plate.
The mouthwash soaked through the paper plate, with a small puddle in the middle leaving a ring around the puddle.  The mouthwash made a perfect circle.   The puddle in the middle of the plate was small and the ring around the puddle was about the size of the nickel but much thinner than the nickle.  Most of the mouthwash soaked into the plate after only a few seconds. 
4. Soapy water on a plastic cutting board.
The soapy water on the plastic cutting board was not a perfect circle. The water moved outward the longer it sat on the surface, the water was a very free moving liquid on the plastic surface.  The water was hard to measure because it moved around so much.  The water was bigger than a nickel and more like the size of a quarter.  The shape of the water was odd  and thin. 
5. Pure vegetable oil on plastic surface.
The vegetable oil stayed in a perfect circle and had good form.  The vegetable oil settled and stayed in one place. The vegetable oil is hard to see in the picture but it is the size of a nickel. The top of the oil was as thick as a nickel. 
6.  Sanatizer on Styrofoam Bowl
The sanitizer on the styrofoam bowl was a perfect circle. It didn't spread out as it hit the plate. It sits on the surface without moving even when the bowl was tilted. The sanitizer was much smaller than a nickle in size, and smaller than a penny.  The sanitizer was not as thick as a penny or a nickel. 
7. Wine on tupperware container (plastic)
The wine on the tupperware container was a perfect circle. It moved around when it was tilted. It was about the same size as a penny, and was about as thick as a penny
8. Wine on tupperware container with oil (cooking spray)
For the eighth experiment I put cooking spray on the plastic tupperware container to give it an oily feeling. When poured, the wine did not make a perfect circle like in the last experiment. The wine spread to wherever the cooking spray was. The wine on the oil surface was bigger than a penny and bigger than a nickel.

9. Soapy water on tupperware container with oil
What forms into various circles, which are not perfect. When I lightly shook the container it didn't cause the liquid to move. The various circles were about the same size of a penny.
 
 10. Sanitizer on a glass surface with oil
When the sanitizer was put into the container it formed circles, but then it began to spread out into the oil. The circles seemed to be consistent in size, and were a little bit smaller then the size of a penny.
Table of data collected.
Circle shape: Experiments 1, 3, 5, 6, 7, and 10
Non-circle shape: Experiments 2, 4, 8, and 9.

Size comparisons of the liquids.
Smaller than a penny: Experiments 6 and 10.
Same size as a penny: Experiments 7 and 9.
Bigger than a penny: Experiments 1 and 2.
Same size as a nickel: Experiments 3 and 5.
Bigger than a nickel: Experiments 4 and 8. 

Conclusion:
After doing 10 different  experiments I have detemined that different liquids produce different shapes and sizes when they are on different surfaces. I noticed that putting oil on the different surfaces directly effected the liquids size and shape when put on top of the oils. Certain liquids change width and height when on different surfaces. I thought it was interesting that each size category had 2 experiements in each of the categories.  I also noticed that more of the experiments had circle shapes than non-circle shapes.  If I were going to do another experiment like this agian I would try all the liquids on each of the surfaces so I could see the differences between the liquids. 

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