Identification of unknowns plays an importatnt part in many undergraduate organic chemistry laboratory courses. Students, by using a computer simulation, are able to discover and rehearse the strategy of identifying an organic unknown in a situation free from the additional uncertainties of performing unfamiliar laboratory work and then relying on the results. Once a logical approach has been developed, identification of an unknown can be undertaken in the laboratory with more confidence and efficiency. A careful analysis of the process of identifying an organic unknown can be undertaken in the laboratory reveals that a number of principles can be formulated that ensure an efficient, logical approach. These include organisms tests into a hierarchical structure, dividing the analysis into stages and integrating spectroscopy and wet tests. A program ("Torganal" derived from Tasmanian developed organic analysis) that incorporates these principles has been developed and is already in use in universities, particularly in Australia. This article discusses Torganal.
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