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In the preparation of acetanilide why is it that zinc dust is used?
The purpose of preparing acetanilide is to use it as an intermediate in the synthesis of various pharmaceuticals and dyes. It is also used as a stabilizer in explosives and as a precursor in the production of rubber chemicals.
The materials needed for the preparation of acetanilide include aniline, acetic anhydride, concentrated sulfuric acid, and ice water. Optional materials include a separatory funnel, filter paper, and a vacuum filtration setup.
The procedure for preparing acetanilide involves dissolving aniline in acetic anhydride and adding concentrated sulfuric acid. The mixture is then heated and stirred until a clear solution is obtained. The solution is then cooled and poured into ice water to precipitate the acetanilide, which is then filtered and dried.
Some safety precautions to take during the preparation of acetanilide include wearing protective gloves and eyewear, working in a well-ventilated area, and avoiding skin and eye contact with the chemicals. It is also important to handle concentrated sulfuric acid with extreme caution, as it is a corrosive and can cause severe burns.
Yes, acetanilide can be prepared using alternative methods such as the Schotten-Baumann reaction or the Sandmeyer reaction. These methods involve different reagents and procedures, but ultimately result in the formation of acetanilide. It is important to follow the specific instructions for each method carefully to ensure a successful synthesis.