Drops Of Water On A Penny Lab Report

The purpose of this lab was to see the hydrogen bonding properties by doing multiple experiments that had exemplified such things. In the drops of water on a penny, I had gotten two pipettes and counted how many drops of that liquid, either being soap water or regular water, could fit into a penny. The second lab called “Water down a string” there was two beakers and string, which was dampened with water. Holding the string at a 45 degree angle, I had to pour water from one beaker at the top of the string and have the water be transported by the string to the other. The third lab was “How curved is your meniscus” where we had to compare the curve of water, meniscus, in a glass graduated cylinder to a plastic cylinder. The last lab we had done was “Pickle

In the “Drops of Water on a Penny” lab, I used the pipette to place 30 drops of regular water on the penny. As I was placing the drops of water on the penny, the water began to form a bubble on the penny, sticking together tightly so that it had risen above the penny. This occurred because of the high surface tension water has due to its hydrogen bonding. On the other penny with the soapy water, I was only able to place 24. Soap is a surfactant to water by interfering the hydrogen bonding and decreasing the surface tension so that the water does not stick to each as well as would have. In the second lab “Water down a String”, when I had first attempted to pour the water down the string, which was dry, it had failed and did not form into beads at first. After I had dampened it, and did a second trial, the water formed into beads and rolled easily down the string and into the second beaker. This again goes back to water’s high surface tension,