compounds that give fruits their characteristic flavours and odours. ie. methyl salycilate is "Oil of Wintergreen". http://www.petrik.com/PUBLIC/library/misc/glossary_of_org_chem.htm#ESTERS Aim To synthesise the ester 3-methylbutyl ethanoate( isopentyl acetate) and to identify the product by its boiling point. Method The ester was prepared by the lab assistant in the fume cupboard by reacting 3-methylbutan-1-ol (iso-pentanol‚ 25mL)‚ and acetic anhydride (24mL plus 3 drops of concentrated sulfuric
Premium Acetic acid Ammonia Ester
Objective: To synthesis acetylsalicylic acid by esterification. Introduction: A pleasant‚ often fruity‚ odor is characteristic of some of the simpler esters. Ethyl butyrate smells similar to pineapples‚ the odor of n-propyl acetate is reminiscent of pears and isopentyl acetate has a strong banana fragrance. Esters are derivatives of the carboxylic acids and contain the following functional group: The synthesis of an ester can be accomplished in one of several ways. An esterification occurs when an
Premium Acetic acid Ester Alcohol
CHEM 113L EXP# 7: Buffer Preparation and pH Measurements Revised . AMB 7-2005 Introduction: Even in quite dilute aqueous solutions‚ acetic acid is very slightly ionized (it would approach 99% ionization only as the concentration approaches 0.0 M): HC2H3O2(aq) + H2O(l) Ka = 1.8 x 10-5. H3O+ + C2H3O2- In general‚ if the acid is not extremely weak‚ the pH of a solution of a weak acid is governed by the concentration of the acid and Ka. Under similar conditions‚ the pH of a solution of a weak base
Premium Acetic acid PH Buffer solution
Objective: Learning how to Prepare Buffers of Various pH levels and Preparation of Acetate Buffer. Introduction A buffer is a solution having the capacity to resist changes in pH levels. Mostly a buffer consists of a weak acid and a salt of strong base or a weak base and a conjugate salt of strong acid e.g. acetate buffer is the most common buffer in which equimolar mixture of acetic acid and sodium acetate solution is used. CH3COOH CH3 COO - + H+ CH3COONa CH3COO - + Na+ Buffers are
Free PH Buffer solution Acid dissociation constant
Lab #4 The Synthesis of Organic Polymers CHM2123‚ Section C October 21‚ 2014 Introduction: Organic polymers are macromolecules that are composed of smaller molecules called monomers. There are two main groups of polymers: natural polymers and unnatural (synthetic) polymers. Natural polymers include proteins such as cellulose and starch and are a necessity for our existence. On the other hand‚ synthetic polymers such as the polycarbonate in our lab goggles
Premium Polymer Solvent
pyyrole in the presence of propanoic acid. The product will undergo UV/Visible Spectrum tests to determine its lambda max. The lambda max will show us the relationship between a conjugated system and the visible spectrum. PROCEDURE: Step 1: preparation of meso-tetraphenylporphyrin (TPP) 1. Set up reflux apparatus: -Add 40 mL of propanoic acid to 100 mL RBF with boiling chips -Attach claisen head to RBF with metal clip -Attach side arm of claisen head to reflux condenser
Premium Chemical reaction Chemistry Acetic acid
concentrations deviated within ±14.65%‚ demonstrating that kaurenoic acid was stable in the human plasma at room temperature for 8 h‚ at −80 °C for 3 months‚ after three freeze and thaw cycles and at 10 °C in the autosampler for 6 h after the preparation procedure. The extraction recoveries of kaurenoic acid from human plasma was 95.1±5.4%‚ and the recovery of IS was 93.4±9.8%. This simple LLE method was successfully applied to the determination of kaurenoic acid in the human plasma after the
Premium Acid Titration Sodium hydroxide
Preparation of Fruit Flavors (Pear) Abstract. In this experiment an assigned Ester is prepared‚ particularly n-Propanol. The Preparation was done via Fischer reaction. In this reaction‚ a reflux set-up is required. The reflux set-up was used in the liquid-liquid extraction. After adding an immiscible solution to the compound containing n-Propanol‚ the mixture now will have two layer: the Organic and Aqueous layer. The organic layer is the extract needed and its % yield is computed resulting to
Premium Acetic acid Ester Carboxylic acid
Preparation of an Ester Acetylsalicylic Acid (Aspirin) OBJECTIVE: To become familiar with the techniques and principle of esterification. DISCUSSION: Aspirin is a drug widely used as an antipyretic agent (to reduce fever)‚ as an analgesic agent (to reduce pain)‚ and/or as an anti-inflammatory agent (to reduce redness‚ heat or swelling in tissues). Chemically‚ aspirin is an ester. Esters are the products of reaction of acids with alcohols‚ as shown in the following equation using
Premium Acetic acid Carboxylic acid Ester
Scent-Infused Textiles consumer acceptance of fragrance-embedded textiles. Consumer willingness of finished products. The Sensory Perception Technologies (SPT) allows textile producers to weave particles of moisturisers‚ deodorants‚ fragrances and even anti-tobacco agents into fabrics. "Early trials have proved SPT a success with many global clothing companies interested‚" ICI‚ whose fragrances unit Quest developed the technology. ICI said the technology allows fabric makers to incorporate tiny
Premium Textile Aroma compound Odor