Inorganic 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…

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…

lowered and measurable because the voltage was altered. Helium, the carrier gas, has a high thermal conductivity so the addition of new gas by change of heat is easily detected. The advantage of using a TCD is the universal nature responding to many inorganic/organic compounds. A disadvantage is that the detector can be too sensitive to changes in flow rate, altering…

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,…

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 purpose of this two-part experiment was to convert an alkene to alkyne. This is difficult to accomplish in one step, thus a multi-step process was used to produce the alkyne. First, bromination of stilbene through the electrophilic addition of bromine to the double bond was performed through an SN2 reaction, as outlined in Figure 3. Pyridinium tribromide, the source of bromine, since elemental bromine is too corrosive and hazardous, was generated in situ (Figure 1). The bromine was added…

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…

The objective of this investigation was to separate a dry mixture based on its physical properties. The iron was separated using a magnet and the salt was removed because it was soluble in water, while the remaining sand was not. The mixture in its tray weighed 51.61 grams. The container weighed 2.51 grams, so the mixture alone weighed 49.10 grams. Running a magnet over the mixture successfully removed the iron. It was determined that the more surface area a mixture was spread over, the more…