PREPARATIONS 129 rises slowly. When a brisk effervescence occurs (at about 70-80°), remove the flame until the reaction subsides. Methylamine is evolved, and is absorbed by the hydrochloric acid in the beaker B. Then distil the solution in the flask carefully, keeping it boiling smoothly and uniformly so that no methylamine vapour escapes absorption in the hydrochloric acid, and at the same time so that the acid shows no marked tendency to rise in the funnel. After boiling for 30 minutes, the distillation of the amine may be considered complete. Concentrate the hydrochloric acid solution by placing it in a 250 ml. distilling-flask connected with a water-condenser, and distilling carefully until about 30 ml. re-main. Then transfer this residual solution to a small evaporating-basin, and evaporate to dryness on a boiling water-bath. (Yield of crude dry material, about 11 g.) Rapidly break up the dr y solid (which consists of methylamine hydrochloride together with
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.