You recently conducted an experiment in your college laboratory in which acetylglycine
was prepared by reaction of glycine with acetic anhydride . Write a report based on the notes
given below, describing the apparatus used and the procedure followed.
0.10 g glycine and 0.4 ml water taken in 5 ml conical vial. Warmed slightly to dissolve the
glycine. 0.3 rnl acetic anhydride added and stirred for about 5 min. Mixture cooled in ice
bath for 10 min. Precipitate collected by suction filtration and washed with a few ml water.
Clystais spread over a piece olfiiter papel or watch glass and air dried for i0 min. Mass and
melting point of product recorded.
Glycine dissolved after about 20 sec when watmed in gl5'cineiwater mixture'
White, needle-shaped crystals formed when reaction mixture cooled in ice.
0.14 g. of solid obtained after f,rltration and drying of product.
mp of crystals recorded as 205-207 n
Solid product possibly still slightly wet.
Conclusion: crystallized material was in fact acetanilide, based on it
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