Chemistry Hydrogen Bonding Lab

The purpose of the Hydrogen Bonding lab was to discover the hydrogen bonding and cohesion of water. In this experiment, we rotated to nine labs where in the first lab, you must calculate the drops of water and soap water on a penny, whereas in the second lab, you must be sure to read the directions and cut the hexagons. Next in the third lab, place a tub on the table and above the tub, set a dried string in a 45 degree angle and let the water go down the string being sure to experiment with a wet string after. After that, compare the surface tension of oil, alcohol, and water for the fourth lab while in the fifth lab, the movement of water must be observed with two different toothpicks. Later, experiment the relationship of water and two different graduated cylinders of plastic and glass for the six lab. In the seventh lab, drop a green, yellow, and red food coloring into the milk and then swirl the center with a toothpick. On the eighth lab, test the action water takes when going up the capillary tube. Finally, in the ninth lab, place water in a pickle jar and observe if it stays in the jar or flows out.

In the first lab, there was a total of thirty-six drops of water onto the penny whereas there was only thirteen soap water on the penny. This is because soap in the water acts as a surfact by interfering with the hydrogen bonding. In the second lab, when the hexagons were cut out, I realized that opposite charges were attracted on the hexagon. In the third lab, the water did not travel down the dried string but it traveled down all the way to tub for the wet string because hydrogen bonds helped the water stay onto the wet string but since the dried string did not have any water, there was not any hydrogen bonding carrying the water which explains why it did not travel down all the way. For the fourth lab, the water stays in its’ shape and form by maintaining a dome shape, while the alcohol could not maintain the clear dome shape as evidence by the expansion, but the oil on the other hand expanded a lot causing it to become flat. This is due to the difference in polarities explaining that the water formed a dome because the wax paper repelled it. For lab five, the blue toothpick was the one with soap because it could