Measure and record the total mass of water and the beaker. Subtract this with the value from step 2 in order to achieve the initial mass of water. Using the electronic scale, Measure and record the mass(g) of the alcohol burner, continue by measuring 150 g of ethanol and insert it into the alcohol burner. Place the wire gauze on top of ring clamp belonging to the ring stand. Place the 250ml beaker on top of the wire gauze.
The cylinder with the sebacoyl chloride was 27.14 grams and the cylinder with hexamethylenediamine was 36.14 grams. We then calculated the mass of the reactants, which is found when we found the difference of the weight of the cylinders before and after sebacoyl chloride and hexamethylenediamine were added. The total mass of the reactants was equal to 41.35 grams. After we calculated these results, we started to create the chemical reaction. We put the sebacoyl chloride and the hexamethylenediamine in separate beakers, but then slowly added the hexamethylenediamine to the beaker with the sebacoyl chloride in it.
CER Labs 2-3 Figure 1. Friedel-Crafts Acylation. Claim: An acetyl group was efficiently introduced to ferrocene by Friedel-Crafts Acylation (Figure 1). We isolated our crude yield while comparing 2 purification techniques: column chromatography and recrystallization. TLC, NMR, and IR spectroscopy were used throughout the process to identify ferrocene and acetylferrocene in addition to evaluating the levels of purity.
In a typical procedure, TiO2 nanoparticles (TNP, 3.6 g) with pure anatase was added into a NaOH (10 N, 150 mL) solution in a teflon lined stainless steel autoclave, sonicated (2 min) and heated the autoclave at 403 K for 48 h in an oil bath under autogenesis pressure with stirring (250 rpm). After 48 h, the autoclave was cooled down to room temperature, subsequently the formed nanotube was washed with ultrapure water until the pH of the solution was >7. Afterward the nanotubes were washed with HCl (0.1 M) solution for overnight under stirring at room temperature. Then the nanotubes were filtered (Millipore filtration assembly) under vacuum pump and repeatedly washed with ultrapure water until the filtrate was free from chloride ion, which was checked by the addition of silver nitrate to the filtrate. Finally, the obtained nanotubes were dried in an oven at 343 K for 12 h and calcined in a muffle furnace at 773 K for 4 h. The synthesized nanotube was abbreviated as
The experiment yield is 1.589g, which is a 80.3% yield. The triphenylmethyl methyl ether is almost pure with only a 0.05 difference in Rf values. Introduction The purpose of this experiment is to create an organic compound by a SN1 reaction. The starting material is triphenylmethyl chloride which reacts with methanol to produce an ether. Methanol is the solvent and nucleophile of the reaction.
We then added 10cm3 ethanoic anhydride to the salicylic acid and swirled the contents, this mixes together the two chemicals. We then added 5 drops of concentrated sulphuric acid to the flask and thoroughly swirled the mixture, this creates the solution that makes the aspirin. We then warmed the flask for 20 minutes in a 400cm3 beaker of hot water which was approximately 60°C, we made sure the flask did not go above 65°C because this could have caused the contents to evaporate. Part 2: Using a 25cm3 measuring cylinder we measured out 15cm3 of ethanol into a boiling tube and then prepared a beaker half filled with hot water at approx. 75°C, we got this temperature by filling the beaker with cold water and slowly adding boiling water from a kettle until we reached the right temperature.
Lecturer Date Introduction Theoretical Background Procedure The procedure was segmented into two categories, the reaction set up and the crude product isolation. Reaction set up The magnetic stirrer was prepared through placing it in the fume cupboard. 1 mmol of L-Phenylalanine was placed and weighed in a 5 mL conical vial. After that, a spin vane was inserted into the vial while adding 0.75 mL of 1M H2SO4 solution. During the addition of the sulphuric acid, the solution was stirred at room temperature until the amino acid (L-Phe) completely dissolved.
An equivalent volume of saline solution was added (NaCl 0.16 M; pH = 7) and it was mixed completely. The resultant solution was centrifugated for 30 minutes at 9000 rpm at 4ºC in a rotor Beckman JA-20, eliminating the pellet. The supernatant was collected to obtain the lipoproteins by gradient density ultracentrifugation: 10ml of the yolk solution were taken and then 0.9 g of potassium bromide (KBr) was added. The bromide was dissolved with a smooth agitation, with care not to denature the proteins. Straight afterwards, saline solution was added (NaCl 0.16 M, pH=7) to the 10ml of the yolk solution with a Pasteur pipette, avoiding the sample diffusion, forming two phases and filling the tube completely.
Introduction The goal of this experiment was to acquire an understanding of the fundamentals of measurement in addition to analyzing the gathered data. During the experiment, an understanding of basic experimental error was gained as well as how to utilize the error equations to account for margins of error in each experiment. For Investigation 1, the mass, length and diameter of four separate cylinders was measured and utilized to calculate the volume and density of the cylinders. After recording these results in the table, the data of the cylinders was graphed. Then, in Investigation 2, a Geiger counter was utilized to measure background radiation in the lab at intervals of one minute for sixty minutes.