Physical science experiments, esters, aim, ester formation, variables, odors, ethanoic acid, chemical reaction, apparatus used, diagram, process, heating alcohol
The aim is to produce 6 different esters using ethanoic acid salicylic acid to compare the odors that are produced to their expected odors.
An ester formation is a chemical reaction that takes place between carboxylic acid (ethanoic acid and salicylic acid) and alcohols when they are heated over the Bunsen burner. This reaction is called esterification, which results in the formation of an ester product. A catalyst must be present in order to speed up the reaction and the one used were sulfuric acid.
[...] The sulfuric acid was used as a catalyst, and this sped the reaction up. This reaction is an esterification reaction, meaning that water is formed as a by-product, which makes this reaction a condensation reaction. These esters can be used as food flavorings to enhance the flavor and smell of food. In the end we can openly say that this experiment was successful. [...]
[...] Waft your hand gently over the beaker with the contents of the test tube and smell. A distinct odor should appear Record your findings in a table Repeat all your steps until the alcohols and carboxylic acids have all been used. Diagram showing the process of the heating alcohol and carboxylic acid https://www.toppr.com/ask/question/see-the-diagram-which-illustrates-the-reaction-between-ethanoic-acid-and-ethanol-accordingly-answer-the/ (Reference of where the diagram has been found) Results: Alcohol used Carboxylic acid used Ester name Researched odor Observed odor Methanol Ethanoic Acid Methyl ethanoate Glue/ nail polish remover Nail polish remover Ethanol Ethanoic Acid Ethyl ethanoate Pear/ fruity Fruity Pentanol Ethanoic Acid Pentyl ethanoate Banana Banana Propanol Ethanoic Acid Propyl ethanoate Pears Nail polish remover Butanol Ethanoic Acid Butyl ethanoate Apple/ banana Banana Methanol Salicylic Acid Methyl salicylate Winter green Winter green Ethanol Salicylic Acid Ethyl salicylate Winter green Winter green Pantanal Salicylic Acid Pentyl salicylate Floral Muscle cream/ Vick vapor rub Propanol Salicylic Acid Propyl salicylate Orchard/ flowery Flowery Butanol Salicylic Acid Butyl salicylate Winter green/ root beer Muscle cream/ Vicks vapor rub Balanced chemical equations for the esters Conclusions and findings The experiment was fought out to be successful. [...]
[...] This reaction is called esterification, which results in the formation of an ester product. A catalyst must be present in order to speed up the reaction and the one used were sulfuric acid. Variables Independent: carboxylic acid used (ethanoic acid and salicylic acid) and the alcohol Dependent: the smell produced Controlled variable: the amount of alcohol or carboxylic acid used Method Apparatus used Beaker Bunsen burner Test tube Alcohol Water Carboxylic acid Cotton wool Tripod stand Set up a tripod stand over a Bunsen burner and light the flame. [...]
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