the dichloromethane. The mixture resulted into to two layers with the upper layer being the aqueous solution while the lower contained the organic substance. After discarding the upper layer‚ the organic layer extracts were transferred into the Erlenmeyer flask containing the anhydrous sodium sulfate and was decant on a weighed evaporating dish under the hood. After which‚ it was evaporated to dryness. The residue was weighed and the percentage yield was calculated. The residue for this experiment weighed
Premium Chemistry Oxygen Tea
was added to convert the carboxylic acid of the benzene to the water-soluble benzoate anion‚ which dissolves in the aqueous NaOH solution while the non-acidic impurities remain in the organic phase. After separating the aqueous layer into an Erlenmeyer flask‚ the basic solution of sodium benzoate was acidified by washing it with HCl and filtering it with DI water. This compound had to most significant recovery of 46. 3%‚ but some may have been lost through the leakage of the previous extraction.
Premium Solubility Chemistry
Lab #24- Preparation 4-Methylcyclohexene Introduction: The goals in this lab were to have a reaction occur with 4-methylcyclohexanol and an acid catalyst to form our product of 4-methylcyclohexene via an E1 reaction. This reaction is accomplished by removing the –OH group on 4-methylcyclohexanol via dehydration and to have a double bond form via a loss of a hydrogen on a β-Carbon. Many techniques and skills were developed in this lab. Among them were dehydration‚ isolation‚ drying
Premium Distillation Stoichiometry
the titrant allows for calculation of the chloride concentration. Materials: volumetric pipettes‚ tubes‚ 250 mL Erlenmeyer flasks‚ 50 mL buret‚ 16.7 g/1L of AgNO3‚ CrO4 solution. Weigh out the sample (NaCl + KCl mixture) into a dry tube in a range of 0.150 g to 0.250 g. Dissolve the salt with water to 10 mL/15 mL/20 mL. Pipette a 5 mL aliquot of diluted salt into a 250 mL flask and add distilled to 100 mL mark. Then‚ add 1 mL of CrO4 indicator to the solution. Titrate the sample with silver
Premium Titration Ion Silver
Date of experiment: September 3rd‚ 2013 Organic Chemistry II – CHLB330 Name: Symone MoxeyLab Partner: Lynden Cooper Isolation of caffeine from tea leave Abstract:- Introduction:- Caffeine is probably the most commonly used addictive drug. This drug is found in a number of things ingested by people. It belongs to a group of nitrogen bases called purines. Because caffeine possesses these base-like properties‚ it is described as an alkaloid. They usually taste bitter and often are physiologically
Free Chemistry Solvent Caffeine
E-stilbene and Ethanol in an Erlenmeyer and heat gently while stirring. After Add 0.4 g pyridinum tribromide and use ethanol to rinse sides. Heat for five more minutes; cool down to room temperature‚ then ice bath. Collect product by vacuum filtration. Weight dry product and take melting point. Synthesis of Bromoactanile: add correct amounts of acetanilide‚ sodium bromide‚ ethanol and acetic acid in an Erlenmeyer. Add a stir bar and plug the top with cotton. Place the flask in ice bath to cool. Add
Premium Carbon Oxygen Chemical reaction
Procedure: Obtain for dry test tubes and number them 1 through 4. Prepare two dry Pasteur pipets with bulbs attached. Place 9.0 mL of hexane‚ 2.0 ml of acetone‚ and 2.0 mL of solution of 70% hexane-30% acetone into separate Erlenmeyer flask. Label and stopper each flask. Place 0.3 mL of a solution containing fluorine and fluorenone into a small test tube. Stopper the test tube. Prepare one 10-cm x 4.3 cm TLC with four marks for spotting. Prepare four micropipets to spot the plates. Prepare
Free Solvent Oxygen Laboratory glassware
Redox Titration Analysis of a Commercial Bleach A. Purpose ! ! ! To review oxidation-reduction reactions and their stoichiometry. To learn the concept and technique of redox titration. To determine the percent (m/v) of an active ingredient‚ sodium hypochlorite (NaOCl)‚ in a commercial bleaching agent. B. Theoretical Background Whereas acid-base reactions involve the transfer of a proton‚ oxidation-reduction or redox reactions involve the transfer of electrons from one substance to
Free Oxidizing agent Sodium Iodine
HYDROXYLATION OF PROGESTERONE BY Bacillus circulans Strain Tex 01-S3c ISOLATED FROM OIL CONTAMINATED SOIL IN OMERGA REGION‚ MAHARASHTRA‚ INDIA S. B. MALI & V.S. HAMDE Dept. of Microbiology‚ Adarsh College‚ Omerga Dist. Osmanabad‚ 413606 malisiromerga@yahoo.com and Dept. of microbiology‚ Yogeshwari College‚ ambajogai‚ Dist. Beed. Maharashtra‚ India Abstract Hydroxylations are possibly the most widespread type of steroid bioconversion. Hydroxylations can be used to buildintermediates
Premium Ribosomal RNA Bacteria Steroid
Use aluminum foil to insulate between the flask and the bottom of the reflux condenser and be sure to attach a drying tube with anhydrous calcium chloride. Heat the solution between 150 – 155oC‚ once at this temperature; keep it there for 20 minutes and avoid overheating. Then allow the mixture to cool to room temperature. Transfer contents to a 25mL Erlenmeyer flask and add 3mL of toluene (if the crystals do not dissolve then the contents may be heated)
Premium Chemistry Chemical reaction Experiment