June 30, 2013
Lab # 4
Properties of Gases
The purpose of this lab was to investigate and discover the physical and chemical properties of some gases. Throughout this lab the ability to identify if and when gasses were present was enhanced.
During the first step of this lab, when obtaining the hydrogen from the mossy zinc and the hydrochloric acid, it took a lot longer than I thought it would for the water in the pipet to be displaced. I was tempted to remove the stopper and add another piece of zinc and see if that would make it go faster, but I did not want to interrupt the process. It seemed the longer that the mossy zinc was exposed to the hydrochloric acid the faster it dissolved and therefore more gas was produced. When the manganese and the hydrogen peroxide were exposed to each other there was much more fizzing produced than that of the zinc and the hydrochloric acid. I was surprised (although I don’t know why) that the lime water turned cloudy when exposed to breath. It is quite simple when you think about it that when you exhale you release carbon dioxide which as shown in the above data turns the lime water cloudy.
During the course of this lab I learned a lot about the generation of gases. I was somewhat confused in the beginning about how to use some of the equipment for this lab. As the lab went on I figured it out and became much more comfortable with