An Integrated Crystallization-Melting Point Experiment for the organic chemistry Laboratory Charles G. Moseley Ohio State University at Lima, Lima. OH 45804 Almost all undermaduate organic laboratory manuals contain technique sections and enperiments on solid purification by crystallization and on melting point determination'-5: how&er. there is twicallvno inteeration of the techniques'to utilize'melting point data t o d&rmiue the effects of variations in crvstallization orocedure on oroduct nuritv. . . In this experiment melting points are used to determine the effect on purity of an important variable in crystallization: the rate of cooling used to induce crystal formation from the hot crystallization solution. T h e procedure involves crystallization of an 85% acetanilide-15% salicylic acid mixture from water using three different cooling conditions. In order to focus on this one variable and to c
