Properties Of Water LAB
Adhesion: The
ability for water to stick to each other. |
Cohesion: The
ability of water to stick to other substances. |
Drops of Water on a Penny.
In this project we had to predict how many drops of water could fit on just one penny and cover it all. We had to use a pipette to add water ONE drop at a time to the penny until it overflows. Our prediction was that 45 drops of water would fit, we were pretty close but actually 50 drops of water fit onto to the penny.
Water Cup & Paper Towel.
In this project we had two plastic cups and a paper towel, one cup was filled with water from the sink with red coloring in it while the other cup was empty. We then put both of the cups next to eachother and rolled up the paper towel and put both ends into each cup. Within two minutes my group and I noticed the water absorbing towards the opposite cup. With four minutes the empty cup started receiving water from the other cup from the paper towel absorbing some much. Within six minutes we noticed that the red coloring started to shift over and makes its way into the opposite cup. Finally at 10 almost 11 minutes we saw that the paper towel absorbed a lot of the water and the opposite cup started to fill. Seeing this reaction from one cup to the other was very interesting .
Water as a solvent
when salt and sugar are placed in water they dissolve unlike the oil, it didn't.
Drop of Water & Alcohol on Wax Paper.
In this project we had to place one drop of water and alcohol onto wax paper and just observe what we noticed. we noticed that the water really didn't want to stick to the wax paper it kept on moving and we realized this was based on the "surface tension" which is why the water and the alcohol reacted differently when being placed on the wax paper.
Paper Clip/ Surface Tension & Soap.
For this project we had paper clips on the surface of a cup of water, we had tweezers and carefully placed them in a cup of water. We had about 4 paperclips on the top of the surface still floating. This also had to deal with the tension of the surface.
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Once we placed soap into the cup full of paper clips and water then they went down to the bottom.
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Once we placed soap into the cup full of paper clips and water then they went down to the bottom.
Alcohol & Water drop on skin.
In this project we had alcohol and water on our hand and had to see which one felt cooler which the alcohol felt much cooler. In order to get rid of your sweat it is more clear to see that alcohol would take a much faster time to evaporate than water which is just like with your body and sweating water takes a longer time to evaporate it, and this is because alchol isn't based however water is.