Acetic anhydride

EXTRACTION OF A KNOWN MIXTURE Separation of mixture of Acetyl salicylic acid (aspirin) and naphthalene Experiment # 6 Introduction A technique called extraction will be demonstrated in this experiment. Extraction relies on the solubility of substances into solvents and the insolubility of the solvents into each other. In this experiment, three organic compounds (aspirin and naphthalene) will be separated from each other. The two compounds are all soluble in ethyl ether (an organic solvent). By…

Sharmistha Santra A Thermometric Titration Table: (Representing the results obtained from the experiment) Known Acid HCl 1 mol dm-3 (± 0.100) Unknown Acid HCl 0.76 mol dm-3 (± 0.100) Highest Temperature (Time) 28.5 (190s) 28.6 (235s) Lowest Temperature (Time) 22.9 (55s) 22.9 (55s) Sample Calculation for the Unknown Concentration C1V1 = C2V2 1 (190 - 505) = C2 (235 - 505) 1 28.0 = C2 37.0 C2 = 2837 C2 = 0.760 mol dm-3 (±0.0500) Sample Calculation for the amount of mole in Unknown…

1. Materials and suppliers • Caffeine (anhydrous), BASF, Germany, was generously donated by Dar Al Dawa Development and Investment Company. Caffeine is 1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione. It is white or almost white, crystalline powder or silky crystals. It is sparingly soluble in water, freely soluble in boiling water and slightly soluble in ethanol. It is used as central nervous system stimulant (British Pharmacopoeia 2009). • Methyl paraben was generously donated by Arab…

For the first synthesis reaction, camphene was converted to isobornyl acetate. In the fume hood, a sample of 1.36 g of camphene was added to a 25-mL round-bottomed flask along with a stir bar. To dissolve the camphene, 3.0 mL of glacial acetic acid was added into the flask. The flask was fastened onto a ring stand and immersed in a water bath that was on top of a stir plate. A thermometer wire was placed in the water bath to monitor the temperature throughout the experiment. After the camphene…

Raju Chandra et al; A reliable and reproducible reversed-phase high performance liquid chromatography (RP-HPLC) was developed for the quantitative determination of quetiapine fumarate from marketed bulk tablets. The active ingredient of quetiapine fumarate separation achieved with C18 column using the methanol water mobile phase in the ratio of 30:70 (v/v). The active ingredient of the drug content quantify with UV detector at 359 nm. The retention time of quetiapine fumarate is 5.27 min. A good…

Synthesis of PEG-RAFT agent The synthesis of the macro PEG -RAFT agent, Chain Transfer Agent (CTA), was performed by esterification method. Briefly, RAFT agent (0.4 g, 1.5 mmol) and dihydroxyl PEG (2g, 0.5 mmol) were dissolved in 35 mL of DCM in a 250 mL round bottom flask equipped with a magnetic stirrer. Then, it was placed in an ice bath (0 ºC); Next, DCC (0.25 g, 1.2 mmol) and DMAP (0.015 g, 0.12 mmol) were added. After 30 min of stirring at 0 °C, the reaction temperature is elevated to room…

2.4 IL-DLLME procedures For IL-DLLME under optimum conditions, 10 mL of the sample solution containing Cd2+ or Ni2+ and PAN (10−5mol L−1) was adjusted to pH in a glass test tube with a conical bottom test tube. Using a microsyringe, the mixture of the extraction solvent ([Hmim][PF6]) and disperser solvent (acetonitrile) was rapidly injected into the previously mentioned aqueous sample. A cloudy solution (water, acetonitrile and [Hmim][PF6] ) was formed in the test tube. The ions reacted with…

Khadra Hassan TA: Hannah Degraaf September 28th 2016 Banana Oil (lab report) Purpose: The purpose of this laboratory experiment was to synthesize banana oil (Isopentyl acetate) from the reaction of Acetic acid and Isopentyl alcohol by the Fischer Esterification reaction. By using the methods of refluxing, washing, drying, and simple distillation to purify the end product. When the product was isolated an IR, H NMR and boiling point were used analysis the product, the end product had a…

“Discussion of Results The goals of this experiment were approached in many ways. To figure out the solubility, which is the ability of a solid dissolving in a liquid, of oils, fats, and detergents, the group tried to dissolve all the beginning substances and finished products in a multitude of solvents. In the testing of the four starting substances for the soaps, the group found that all the substances were insoluble in water and hydrochloric acid. However, vegetable oil was soluble in…

The expression "SN1" is the abbreviation of "unimolecular nucleophilic substitution reaction", one of the most common reactions in organic chemistry. As a fundamental reaction type, the mechanism of SN1 reaction has long been clear to the researchers, and the rate of the reaction concluded from the mechanism is quite simple. According to the mechanism, the rate of an "ideal" SN1 reaction is only proportional to the concentration of the substrate, which can be expressed as the following formula:…