Lab Report

1519 WordsFeb 16, 20127 Pages
Esterfication Abstract: Through the process of esterification, carboxylic acid was reacted with an alcohol in order to produce an ester and water as the products. An acid called benzoic acid was reacted with an alcohol identified as ethanol. Through the use of heat and a catalyst, which in this case was sulphuric acid, an ester in the form of ethyl benzoate was produced along with water. The cherry odour comes from the ester called ethyl benzoate. Theory: The purpose of this lab is to achieve a specific odour through the process of esterification where carboxylic acid and alcohol react to produce an ester and water with the assistance of heat and a catalyst such as sulphuric acid. Esters with odours such as banana, cherry, orange, red grape, rum and wintergreen can be formed through this process through the use of a specified alcohol and carboxylic acid. For example, in order to produce ethyl benzoate which is the ester required to receive the cherry odour, the following reaction needs to occur: H2SO4 CH3CH2—OH + C6H5COOH ( C6H5COOC2H5 + H2O benzoic acid ethanol heat ethyl benzoate water In order to verify that an esterification reaction has taken place, there should be a change in solubility, melting point, boiling point and a distinct change in the odour of the substance from the original reactants. The carboxylic acid family is highly polar since oxygen is slightly negative in comparison to hydrogen which is slightly positive in terms of electronegativity. This means that acid's can be expected to have a higher melting point and boiling point in relation to alcohol's because of its strong intermolecular force which in this case is the hydrogen bond. The reason as to why acids have high melting points and

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