Vacuum flask

mixture. It should be noticed that crystals should form almost simultaneously. Next, this needs to be in an ice-bath again for another 3-5 minutes. Once the time is up, vacuum filtrate the solution and obtains the crystals from this. Make sure while vacuuming it, to add water and rinse it with about ml of water the most. Once the vacuum filtration is complete, air-dry the crystals before weighing them or getting the melting…

column to rinse out the Erlenmeyer flask and powder funnel. The solvent was pipetted into the column in a circular motion to get the remaining silica gel off of the walls of the column. The stopcock of the column was opened and the solvent was collected in another Erlenmeyer flask until the solvent level in the column was 1 cm above the silica gel. The collected solvent was a yellow color and therefore not reused. The annatto extract in the 50mL round bottom flask was dissolved in 10% ethanol in…

The first experiment that was performed was the oxidation of 9-fluorenol, which is the decrease of a molecule’s hydrogen content.6 The following chemicals were used in the experiment: 9-fluorenol, sodium hypochlorite (the oxidizing agent), sodium thiosulfate (the reducing agent), sodium bicarbonate, acetic acid, and acetone.3,6 To begin the experiment 9-fluorenol, acetone, acetic acid, and sodium hypochlorite were added in sulfate is added to remove excess water from the hexane layer that is…

sufficiently concentrated (almost 0.2 mL), add deoxygenated diethyl ether dropwise until precipitation occurs. Cool the flask in an ice bath and collect the light yellow crystals by filtration. Calculate the percent yield and obtain the IR spectrum7. Assign the peaks in the infrared spectrum. Then record the identifyinh NMR peaks found through NMR…

In2O3 NC-IBA can dissolve well in DMF. The room temperature Sonogashira coupling reaction of 4,4′-(ethyne-1,2-diyl)dibenzoic acid capped In2O3 NC (In2O3 NC-EBA) was prepared as follows: a 100 mL round flask with a stirring bar was fitted with a rubber septum and flame dried under vacuum. The flask was purged with dry argon and charged with 0.2 g of starting material In2O3 NC-IBA in 6 mL of anhydrous DMF (yellow transparent solution). In addition, Pd catalyst (PdCl2(PPh3)2, 20 mg, 98%,…

yellow. Sodium thiosulphate and hydrochloric acid were added aswell. Product collected by vacuum filtration and recrystallized from 96% ethanol. IR- and H- NMR-spectrum were taken to determine the location of the I+. I had a yield of 0,7 g (2,66mmol, 18,2%). The iodide’s position is opposite of the –OH group. Salicylamide…

Analgesics are a group of drugs used to alleviate pain with their various structural and physiological characteristics. Due to the high diversity of the human body, there are different groups of analgesics that are programmed to assist with pain in different parts of the body. One of the first group of analgesics produced are Narcotic Alkaloids. This group was obtained to reduce and block the activation of the pain in the neurons of the gray matter of the spinal cord and at certain receptor…

lab, a clean 100 mL round bottom flask, 1.002 g of Mg turnings, 4.5 mL of bromobenzene, heating mantle, stir bar, stir plate, water hoses, condenser, and grease were obtained. The bottom of the condenser was greased and connected to the flask. The heating pad was placed under the flask and the stir plate was placed under the heating pad. The water hoses were attached to the condenser and then the water was turned on. Next, the Mg turnings were placed in the flask and the stir plate was turned on…

salicylic acid. With excess acetic anhydride and a concentrated acid, 0.510 g of salicylic acid should have yielded approximately 0.665 g of acetylsalicylic acid. Unfortunately, small quantities of the reagents and products adhered to the sides of the flask and filter paper during the experimental process. In the end, an actual yield of 0.524 g resulted from the experimental procedures. This quantity equated to a 78.8 % yield. The purity of both the salicylic acid used and the…

acid was prepared in a 100-mL Erlenmeyer flask and was placed into a water bath to cool to room temperature. 3.93 grams of bromobenzene was added to the solution over a period of 10 minutes with constant mixing. After all of the bromobenzene is added, the mixture was heated with a hot water bath for 30 minutes. The flask was cooled to room temperature and then poured into 50 mL of ice-cold water in a 200 mL beaker. The crude product was isolated by vacuum filtration and then washed with cold…