The Product Being Used For An Organic Compound

An Erlenmeyer flask was used to accommodate the largest volume of recrystallization solvent calculated and was cooled in an ice bath to increase the yield of crystals. The solid was collected by vacuum filtration and washed with a small amount of ice water. The product is then dried to a constant mass by use of an oven and weighed. A small amount of the unknown was compared to two samples of acetanilide and phenacetin for a melting point range to determine the identity. The temperature of the unknown was recorded when the first trace of liquid can be seen and when the unknown was completely liquid.

Recrystallization is a technique frequently used in organic chemistry to purify solid organic compounds. The goal of this technique is to allow organic compounds to form crystal lattice structures, and to remove any of the impurities that do not align within this crystal structure.1 The theory behind recrystallization revolves around entropy; as heat will cause a organic compound to dissolve (increase in entropy), a decrease in heat will then allow that organic compound to reform (decrease in entropy) and become purer.2

The product was placed in a Craig tube and several drops of hot (100°C) solvent (50% water, 50% methanol, by volume) was added and heated until all of the crystals dissolved. The Craig tube was plugged and set in an Erlenmeyer flask to cool. Crystallization was induced once the mixture was at room temperature by scratching the inner wall of the tube. It was then placed into an ice bath for ten minutes until crystallization was complete. The tube was then

The aspirin was synthesized when it was placed in a cold bath. Purification was necessary to remove any unreacted salicylic acid and acetic anhydride as well as the acetic product and phosphoric acid. Acetic acid and phosphoric acid are water soluble so they were removed by

Purpose: To use indicators to test for the presence of organic compounds in certain substances.

7. Plan: Each student in a group of three will work to purify the product of the reaction with cis-stilbene, trans-stilbene, or styrene. The crude products will be purified through recrystallization. This purification process will be performed several times. When the recrystallization is complete, a vacuum filtration will be executed to filter out the crystals. An NMR spectrum will be taken of the recrystallized product.

Recrystallization purifies a crude product by separating the product from impurities based on solubility. The product being purified should easily dissolve in the chosen solvent at high temperatures, but not at room temperature. Impurities should dissolve in the solvent at room temperature but not at high temperatures.

To tube 2 and tube 3 a boiling chip is added. The two tubes are boiled to remove any residual ether. Next, the tubes are cooled to room temperature and placed into an ice bath to allow for crystallization. The solution is then removed from the solid in each tube and discarded. To tube 2 and 3 ~0.5 ml of H2O is added for recrystallization, the tubes

Crystallization was induced in the solution by scratching the inside of the beaker with a glass stir rod. 2. Next, an ice bath was made by partially filling a 400 mL beaker with ice and covering the ice with water. 3. The beaker containing the solution was then placed in the ice bath for approximately 15 minutes.

A separatory funnel was placed in a ring, connected to a ring stand. Underneath the separatory funnel, an Erlenmeyer flask (50mL) was placed, written NaHCO3 extract. Then, the unknown sample (approximately 1.00 g) and Diethyl ether (approxiamtely 20 mL) is transferred to the separatory funnel. Not to mention, NaHCO3 (12 mL, 10%) is added into the separatory funnel. Afterwards, liquid-liquid extraction was done to extract the solution. Once the solution was separated, the aqueous solution was drained into the Erlenmeyer flask labeled NaHCO3 extract mentioned earlier twice; however, the second extraction was done with another dosage of NaHCO3 (3 mL, 10%). Another Erlenmeyer flask is brought and labeled acetanilide. The last portion- diethyl ether phase- of the separatory funnel was drained into the Erlenmeyer flask labeled acetanilide. The labeled acetanilide is dried with Na2SO4.

The solution is then cooled and recrystallization of the solute occurs. For a solvent pair to

Organic chemical preservatives: Examples are benzoate (benzoic acid and its salts such as sodium benzoate), sorbic acid and its salts, and p-hydroxybenzoic acid (PHB). Take benzoate as an example to show their harms since it’s really widely used and it’s easy for us to find it in the ingredient lists. Benzoate can harm our genes. Sodium benzoate can react with Vitamin C and produce benzene, which has been believed to be carcinogenic.

Recrystallizing solvent is a solvent that shows the desired solubility behavior for the substance to be crystallized. Identifying the ideal recrystallizing solvent of a compound is necessary to purify the organic compound.. In choosing the recrystallizing solvent, the compound should be insoluble at room temperature. While heating, the compound should be very soluble and upon cooling, it is insoluble. The unwanted impurities should be soluble at room temperature or insoluble during heating. The recovered crystals from the final procedure were only half of the

Repeated exposure to the chemical benzene can be a factor in AML development. Benzene damages the DNA of normal marrow cells. According to the Agency for Toxic Substances and Disease Registry, despite the fact that petroleum products contribute to the majority of benzene in the atmosphere, half of the total national personal exposure to benzene comes from cigarette smoke. Benzene is also found in certain industrial settings. Genetic disorders, such as Fanconi’s anemia, Shwachman syndrome, Diamond-Blackfan syndrome and Down syndrome, are associated with an increased risk of AML. Very rarely, an unexpectedly high number of cases of AML may be diagnosed within the same family. Clusters of AML in unrelated people within a community

If the solute melts prior to the boiling of the solvent, recrystallization will not be able to occur. For example, if you wanted to purify a sample of Compound X which is contaminated by a small amount of Compound Y, an appropriate solvent would be one in which all of Compound Y dissolved at room temperature because the impurities will stay in solution and pass through filter paper, leaving only pure crystals behind. Also appropriate would be a solvent in which the impurities are insoluble at a high temperature because they will remain solid in the boiling solvent and can then be filtered out. Finally, the solvent should be volatile enough as to evaporate from the surface of the compound and be of low financial cost.