RECRYSTALLIZATION Group Medical Technology Organic Chemistry Laboratory ABSTRACT Recrystallization is one of the simplest and most widely used technique for purifying organic solids through the differences in solubility at different temperatures. It is also the process in which the solid to be crystallized is dissolved to either a hot solvent or a hot solvent mixture and is cooled in a solution.In this experiment‚ acetanilide‚ the crude product of acetylation of aniline and acetic anhydride
Premium Solvent Solubility Oxygen
properties and reactions. b) Study substitution and addition reactions. Equipments test tube rack (1) test tube holder (2) 100 mL beaker medium test tube (6) Materials cyclohexene toluene n-hexane conc. H2SO4 Br2/CCl4 or Br2/CH2Cl2 0.50 % KMnO4 10% NaOH 10% Na2CO3 unknowns hydrocarbons Discussion Hydrocarbons‚ compounds which contain only carbon and hydrogen‚ can be classified into several types‚ depending on their structure
Premium Alkene Hydrocarbon Potassium permanganate
and colorless and observed to have a plastic like odor. Miscibility test shows that all of the organic compounds are immiscible and all are flammable. Tests for active unsaturation indicate that hexane‚ heptane‚ cyclohexane‚ benzene and toluene are saturated while cyclohexene is actively unsaturated. Hexane‚ heptane‚ benzene‚ and toluene are classified as aliphatic while cyclohexane‚ and cyclohexene are aromatic. All are not oxidized except for cyclohexene. I. Introduction
Premium Benzene Hydrocarbon Carbon
and extract them. In this experiment‚ soxhlet extraction was used. Soxhlet extraction is an extraction method that uses chemical solvents. Oils from the algae are extracted through repeated washing‚ or percolation‚ with an organic solvent such as hexane or petroleum ether‚ under reflux in a special glassware. Copra‚ dried kernel of the coconut‚ was the sample used. Often though‚ the sample must be ground and prepared prior to the extraction procedure in order to break up the cell membranes and other
Premium Solvent Solubility Diethyl ether
Oxidation of the porphyrinogen during the reaction yields the porphyrin .Usually porphyrins are purified by column chromatography often traditional halogenated solvents. However in this green chemistry experiment‚ a safer chromatography solvent mixture (hexanes and ethyl acetate) is used to help with the avoidance of solvent usage‚ the use of solid supported reactions and the use of alternative energy sources. Materials & Methods * 0.43ml of Benzaldehyde 0.30ml of pyrrole * 0.63g of Silica
Premium Solvent Thin layer chromatography Chemical reaction
COLUMN AND THIN LAYER CHROMATOGRAPHY Maria Janine B. Abarientos‚ Kuia B. Allarde‚ Aliana Keshia P. Andino Mary Viadelle E. Andrada and Nina Marian Robelea G. Ang Group 1 2C Pharmacy Organic Chemistry Laboratory ABSTRACT In this experiment‚ the techniques column and thin layer chromatography was used to separate and determine the purity of the colored components of siling labuyo and malunggay leaves. The results obtained relied on differential solubilities and adsorptivities of the components to
Premium Chromatography Thin layer chromatography
Fenugreek (Trigonella foenum graceum L.)‚ an indigenous spice crop of India has been widely used in traditional medicine for treating various kinds of diseases. In this work‚ 10 genotypes of T. foenum-graceum were evaluated for their diosgenin content and productivity‚ ascorbic acid (AA)‚ total phenolics (TP)‚ flavonoids (TF)‚ tannin and antioxidant activity (AOX). Results indicate that fenugreek is a good source of flavonoid and total phenolics ranging from 2.74to 12.03 mg/g and 22.59 to 62.59 mg/g
Premium Antioxidant Antioxidant Fenugreek
Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment‚ a nitro group was used as the substituent in the ortho‚ meta and para positions‚ with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate‚ ethyl-3-(2-nitrophenyl)acrylate
Premium Aldehyde Nuclear magnetic resonance Organic chemistry
Corporate Social Responsibility – Seminar Work Apple Inc. Current company position including market size/share 90% of the market is controlled by the top 10 manufacturers‚ Apple being the most profitable. During the fourth quarter of 2012‚ Apple took 70% of all profits generated by the smartphone market while Samsung trailed at a distant second with 25%. Q2 2014 – Apple (iOS) controls 11.9% of current smartphone market share whilst Samsung dominates 25.2%‚ however Apple are actually more profitable
Premium Apple Inc.
this is a possible reason the desired product still formed. Column chromatography was chosen to purify the compound because it can purify almost any mixture of solids and/or liquids. Using a solvent mixture that was composed of 15% ethyl acetate in hexanes‚ the product eluted straight from the column. It was predicted that the starting material would elute first but there was none present when the column was ran. Since there was not much of a separation‚ what eluted from the column was analyze to confirm
Premium Nutrition Vitamin C Antioxidant