Abstract

Kansas State Teachers College, Pittsburg The wide spread use of statistical methods of quality control in industrial chemical laboratories 1 3 4), led the author to undertake the use of similar methods in a study of the reliability of results obtained by students in college laboratories. Twenty students in a class in elementary quantitative analysis collaborated in the studies. Each student made two determinations of each type selected for the experiments, and reported the results of both determinations, thus making possible a study of the range between the two check results as well as a comparison of the work of different students. The students had had previous experience in some of the analyses selected, such as the titration of an acid with a base, but were unfamiliar with the other experiments, such as the double indicator titration and the Volhard method for chlorides.

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