Preparation and isolation of an Ester Aim: To make an ester and purify it Background Theory: Esters are derived from carboxylic acids and alcohols with the presence of a catalyst. A carboxylic acid contains the -COOH group‚ and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. Sulfuric acid (H2SO4)is used as a catalyst for this reaction in order to accelerate the rate at which the product is formed. The general formula of an ester is RCOOR’ in which R is the
Premium Distillation Acetic acid
The Formation Of Esters Aim: To observe the reactions between ethanoic acid and different alcohols in the preparation of a variety of esters. Apparatus: • Bottles containing: glacial Ethanoic acid‚ Methanol‚ Ethanol‚ Propan-1-ol‚ • Propan-2-ol‚ Butan-1-ol‚ Butan-2-ol and Conc. Sulfuric acid. • 1g Salicylic acid • 10 ml Measuring cylinder • Test tubes • 250ml Beaker • One-hole rubber stopper • 50cm length of glass tubing to fit stopper • Hotplate • Safety glasses Method: 1. Set up a 250ml beaker
Premium Acetic acid Oxygen Ester
------------------------------------------------- Definition Esters are chemical compounds consisting of a carbonyl adjacent to an ether linkage. They are derived by reacting an oxo acid with a hydroxyl compound such as an alcohol or phenol. Esters are usually derived from an inorganic acid or organic acid in which at least one -OH (hydroxyl) group is replaced by an -O-alkyl (alkoxy) group‚ and most commonly from carboxylic acids and alcohols. That is‚ esters are formed by condensing an acid with an alcohol. Esters are ubiquitous. Most
Free Carboxylic acid Ester Alcohol
Introduction: In this experiment‚ when vinyl strip and acetate strip is rubbed by tissue‚ it will charge the vinyl strip negatively and acetate strip positively caused by the transfer of electron between the strip and tissue. If molecules have non zero bond dipole‚ because polar molecule must have a non-zero molecular dipole where electron spend more of their time closer to one atomic nucleus than the other and make one end partially positive or negative than the other end. Different charge will
Premium Atom Electric charge Molecule
Hydrolysis of macromolecules Abstract: This lab was designed to teach the process of “hydrolysis”‚ a chemical reaction in which water is added to a polymer‚ breaking its bonds and forming smaller molecules. A hydrogen cation and a hydroxide anion (which once formed water) break apart and attach themselves to the ends of shorter polymers. Hydrolysis plays an important role in our lives and in the lives of every living thing on earth. Living organisms rely on digestion (hydrolysis) to convert
Premium Starch Carbohydrate Cellulose
ring as that purged by the halogen substituent. Case in point‚ the hydrolysis of 4-chloromethylbenzene at 340° gives an equimolar mix of 3-and 4-methylbenzenols: Significantly all the more striking is the elite development of 3-methoxybenzenamine in the amination of 2-chloromethoxybenzene. Notice that this outcome is an infringement of the standard of minimum basic change (Section 1-1H): The arrangement of this kind of reaction has been focused broadly‚ and much evidence has accumulated in moving
Premium Oxygen Solvent Chemistry
1.TITLE: To prepare isopentyl acetate (isoamyl acetate) 2. AIM: To make an ester referred to as banana oil from acetic acid and isopentyl alcohol 3.THEORY: This ester is often referred to as banana oil‚ since it has the familiar odor of this fruit O O CH3 H+ CH3 CH3C OH +
Premium Acetic acid Distillation Ester
Reactions in Aqueous Solutions: Metathesis Reactions and Net Ionic Equations Introduction: Metathesis or double decomposition reactions are a reaction in which two compounds react to form two new compounds‚ with no changes in oxidation number. The ions of two compounds exchange partners. AX + BY AY + BX This reaction can occur between two inorganic salts when one product is insoluble in water‚ driving the reaction forward. A typical example is as followed and is considered a molecular equation
Premium Sodium chloride Chlorine Chemistry
Introduction ESTERS are compounds derived from the reaction of a organic acid with an alcohol. Acid + Phenol/alcohol --> ester + water R--C=O + R’--OH ----> R--C=O + H2O | | C-OH C-O-R’ Esters are the 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
Premium Acetic acid Ammonia Ester
SYNTHESIS OF ESTERS USING GREEN AND NON-GREEN CHEMISTRY Abstract Esters are a class of organic compounds with the general formula RCOOR’. Ester also contributes the flavor and aromas in fruits and flowers. The esterification reactions will use in the procedure‚ which are the interaction of a carboxylic acid with an alcohol‚ aided by an inorganic acid catalyst (H2SO4). Moreover‚ the green method will not use any catalyst but using heating source instead (microwave). Based on the comparison of
Premium Ester Acetic acid