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Ethanoic acid

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Production of Ethanoic Acid Introduction I am doing this experiment to try and find out whether I can produce ethanoic acid in a college laboratory. Hopefully I will produce ethanoic acid and hopefully it will be pure. Also, I will be synthesizing the ethanoic acid. Equipment * Anti-bumping granules * Dilute sulphuric acid * Pear shaped flask * Potassium dichromate * Concentrated sulphuric acid * Bunsen burner * Gauze * Tripod * Clamp stand Method 1. Put a few anti-bumping granules and 10 cm3 of dilute sulfuric acid in the round bottomed flask. 2. In a fume cupboard, add in 5 g of potassium dichromate and dissolve by careful swirling. 3. Slowly with swirling and cooling in an ice bath, add 6 cm3 of concentrated sulfuric acid. 4. Mix 15cm3 of ethanol and 10 cm3 of deionised water in the dropping funnel. 5. Add the solution from the dropping funnel drop wise down the condenser, while swirling the contents of the flask and cooling it if necessary to prevent too vigorous a reaction. ...read more.


The distillation technique separates the solutions and hopefully leaves it with no impurities. When the temperature reaches the boiling point of the different substances in the solution each part is fractionally distillated. To collect the different fractions we collected them in different test tubes. When the temperature got to specific points we changed the test tube to collect the different fraction that boils at that specific temperature. Testing Impurities Universal indicator We used universal indicator to determine the pH value of the different fractions. Ethanol had a boiling point of 78oc and this fraction was a pale green and yellow colour. This shows that it has a pH value of 4. The other fraction that was collected boiled at 118oc and this was the ethanoic acid. This had a pH value of 3. Potassium Dichromate I added 1cm3 of my solution to 5 drops of potassium dichromate and 5 drops of sulphuric acid into a test tube and I heated it in a hot water bath for 10 - 20 minutes. ...read more.


Conclusion After doing this experiment I concluded that I did produce some ethanoic acid. To make this experiment better if I was going to do it again I would make sure that I have measured out everything accurately and carefully. During the fractional distillation, I only collected two different fractions so this tells me that maybe my measurement were incorrect. I will also make sure that I will measure out accurately every measurement that there is and try my best to make sure that they are as accurate as possible. Evaluation We only managed to produce very little ethanoic acid. To try and improve this experiment, if I was to do it again, we could have checked all my equipment before we used it to make sure that there wasn't any other substance that could have contaminated my results. Also, I would repeat the same experiment more than 3 times so this will enable me to get an average from the different results and this will give me a more precise result. ?? ?? ?? ?? A Level Applied Science Unit 10: Synthesising Organic Compounds Joshua Ramchandani 1 ...read more.

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