Tables For Qualitative Chemical Analysis Arranged For The Use Of Students

Excerpt from Tables for Qualitative Chemical Analysis: Arranged for the Use of Students It is, of course, not necessary for every student to work through the reactions for all the substances given in these tables; typical ones can be selected according to circumstances, e.g. the medical student need not necessarily work through the reactions of rare earths. Theory or Qualitative Analysis. - It is assumed that the student will be taught the principles of analysis and how to use these tables, and that he will not be left to struggle through them unaided; it is for this reason and because the book is intended for bench use that equations and the usual more or less lengthy explanations are omitted. The directions arc made as brief as possible, for students when engaged in practical work have usually neither the time nor the inclination to wade through more or less lengthy descriptions of the methods of procedure. In this laboratory the principal explanations are given in the form of leturettes and demonstrations of fifteen or twenty minutes before the practical exercises; the class also meets once a week for one hour's tutorial instruction in the theory of qualitative analysis, chemical equations, calculations and similar matters, and there is a written examination upon the work at the end of the term, as well as practical and theoretical examinations at the end of the year. Weighing and Measuring. - By requiring the student to work throughout with weighed or measured quantities, it is necessary that he should be shown, unless he is already familiar with them, how to use the balance, burette, measuring flasks and pipettes; the small amount of extra time necessary for this will, however, be well spent. The quantity of substance to be examined can either be weighed out separately by each student, or students can take it in turns to weigh out and divide the portions for a group of students. The balance used need not be an expensive one, very good chemical balances, weighing to a milligram, can now be obtained for less than 30/-; if the balance available is not sufficiently sensitive for the smaller weights, larger quantities can be weighed out, placed on glass or glazed paper and divided by a spatula into approximately equal parts, just as powders are sometimes divided by pharmacists; although this would not be quite so satisfactory, it would be a great improvement upon the usual method of shaking an indefinite quantity out of a bottle. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Tables for Qualitative Chemical Analysis In adapting an elementary course of chemical analysis to this purpose the accompanying tables seemed peculiarly suited. Whilst compact, they are sufficiently explicit, and the summary view of the general course of qualitative analysis, and of the classification of compounds according to the properties relied upon for their detection, affords a thread, as it were, around which chemical facts may crystallize as they accumulate. For details of properties, &c., in addition to instruction in the laboratory, the student is constantly referred to some one of the manuals of analytical chemistry placed in the laboratory for this purpose. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.