Environmental chemistry

Abstract The Purpose of experiment is to introduce the technique of crystallization, by following methods to purify the antibiotic sulfanilamide away from acetanilide. From the laboratory experiment, 0.51 g of impure sulfanilamide was at first measured and experienced in the crystallization procedure. Because of different steps of the experiment, the last mass of the crystal was 0.22g. This demonstrates the procedure decreased the underlying mass by 0.28g which mean the 43.13% recovery using…

A dilution is created when two solution are mixed together to reduce the concentration, or when water is added to a solution for the same reason. Molarity is the amount of molecules that a substance contains, for example, the amount of sodium ions in water after adding 2 grams of salt or the amount of sodium chloride molecules to in 10 grams of salt. The reason that we need to understand the molarity of a substance is to have a more controlled experiment. When the molarity of a substance is…

The objective of Experiment one (both Week one and two) was the separation and examination of Ethanol from complex mixtures using solvent-solvent extraction and chromatography. Week one involved retrieving the concentration of Ethanol and the partition coefficient from standard solutions utilizing the calibration method. Week two was centered on the use of a standard addition method to find Ethanol concentrations in beer samples. Overall, the experiment addressed the issues associated with…

The technique used in this experiment was serum protein electrophoresis to determine the levels of proteins in cow serum. The objective of this experiment is to perform a gel electrophoresis of cow serum by agarose gel electrophoresis and to interpret the banding patterns produced by the migration of the serum. Electrophoresis is the shift of ions in an electric field in which the protein moves in the gel based on size as well as in electric charge. The electrophoretic mobility of small…

In these two weeks, I observed a chemistry class taught by Angela Willson. The main topic for these two weeks was Matter. I was very interesting to observe the chemistry class because chemistry is major. The first thing that got my attention when I entered the class, the teacher wrote a long list for everything they would do as numbers of orders, and in the top of the board she wrote“ Agenda-Day5”. Usually, teachers use objectives, so it was good for me to learn a new word. The list became…

The purpose of this experiment is to demonstrate the molar mass by using the freezing points of the two solutions. Colligative properties were used in calculations during this experiment to discover the molar mass of an unknown solute. These properties are subsequently applied to solutions depending on the amount of particles of the solute and the solvent inside the solution. In this lab, we focus on the freezing point depression, which can be seen when a pure solvent is added to or mixed with a…

My interest in biology and chemistry stems from the fact it explains a world that’s not visible to the eye, but is a key role to life. This sparked my interest in the intricacy of the human anatomy and physiology which has me curious to the research required. The desire to pursue a career in helping others, but also to explore science at a greater depth. I believe biomedical science will enable me to broaden my perspective and give me a solid foundation of knowledge and skills required for…

played a big part in his childhood. He read numerous science magazines and articles as a child. He was very interested in inventing things. He was also a piano prodigy (Britannica). When Hall began college at Oberlin College, he was quick to study chemistry. He found an interest in aluminum as it was very hard to extract at the time. This interest…

6.3 Results and Discussion 6.3.1 The influence of high pressure on the kinetics of α-chymotrypsin The choice was determined by the fact that the catalytic mechanism as well as pressure stability of this enzyme is well established. α-chymotrypsin-catalyzed hydrolysis proceed according to the Michaelis–Menten mechanism. The initial process involves creation of a stable enzyme substrate complex ES, which is related to KM, afterwards activation of the ES^≠ and subsequent reaction steps occur,…

Discussion: In sample, B there was 16% salt, which is unnaturally higher than the global average of 3.5%. When I asked about the reason of this, I found that the water was artificially created. This was also the case of Sample, A which had 9% of salt. That is about 3x the amount of salt from the global average. All though this is not an experiment with data, that we can apply to real life, it was still great fun to do the experiment and the lessons I learnt will stick with me for a long time.…