The Acetylation of Para-Aminophenol. Aim To make para-hydoxyacetanilide as pure as possible, through acetylation of Para- aminophenol.

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The Acetylation of Para-Aminophenol

Aim

To make para-hydoxyacetanilide as pure as possible, through acetylation of Para- aminophenol.

(Pal, S n.d, online)

Experimental

Laboratory safety precautions which were taken during this experiment were safety goggles and lab coats were worn. The effect of acetic anhydride causing eyes to water meant it is a necessity to wear goggles. It is important to ensure to avoid contact, inhalation, and ignition sources around this chemical as it is flammable.

Part1

15cm³ of water was added to a 100cm³ conical flask. This was then added to a suspension (mixture) of para-aminophenol (5.5g). The result of adding water meant the product became cloudy and fizzed. With the addition of ethanoic (acetic) anhydride (6.0 cm³) the solution changed from a cloudy white to a yellowy/brown colour which was only slightly transparent. The mixture was vigorously stirred and left to warm in a water bath (hot plate). Within the first few minutes of the product being on a hot plate, it began to dissolve slowly. After the product had dissolved it was a pale yellow transparent colour. Once it had fully dissolved, the product was left to cool down.